7957543650840 has 640 divisors, whose sum is σ = 31416419865600. Its totient is φ = 1768400501760.

The previous prime is 7957543650817. The next prime is 7957543650893. The reversal of 7957543650840 is 480563457597.

7957543650840 is a `hidden beast` number, since 7 + 9 + 5 + 7 + 54 + 36 + 508 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1536499371 + ... + 1536504549.

It is an arithmetic number, because the mean of its divisors is an integer number (49088156040).

Almost surely, 2^{7957543650840} is an apocalyptic number.

7957543650840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7957543650840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15708209932800).

7957543650840 is an abundant number, since it is smaller than the sum of its proper divisors (23458876214760).

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

7957543650840 is a wasteful number, since it uses less digits than its factorization.

7957543650840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7077 (or 7064 counting only the distinct ones).

The product of its (nonzero) digits is 127008000, while the sum is 63.

The spelling of 7957543650840 in words is "seven trillion, nine hundred fifty-seven billion, five hundred forty-three million, six hundred fifty thousand, eight hundred forty".