1640944361070 has 288 divisors, whose sum is σ = 5073134976000. Its totient is φ = 366765501312.

The previous prime is 1640944361033. The next prime is 1640944361071. The reversal of 1640944361070 is 701634490461.

1640944361070 is a `hidden beast` number, since 1 + 64 + 0 + 94 + 436 + 1 + 0 + 70 = 666.

It is a super-2 number, since 2×1640944361070² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640944361071) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 289967901 + ... + 289973559.

It is an arithmetic number, because the mean of its divisors is an integer number (17615052000).

Almost surely, 2^{1640944361070} is an apocalyptic number.

1640944361070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640944361070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2536567488000).

1640944361070 is an abundant number, since it is smaller than the sum of its proper divisors (3432190614930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640944361070 is a wasteful number, since it uses less digits than its factorization.

1640944361070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7132 (or 7122 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 1640944361070 in words is "one trillion, six hundred forty billion, nine hundred forty-four million, three hundred sixty-one thousand, seventy".