1649659704 has 128 divisors (see below), whose sum is σ = 5171558400. Its totient is φ = 426003840.

The previous prime is 1649659703. The next prime is 1649659717. The reversal of 1649659704 is 4079569461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649659703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 328299 + ... + 333285.

It is an arithmetic number, because the mean of its divisors is an integer number (40402800).

Almost surely, 2^1649659704 is an apocalyptic number.

1649659704 is a gapful number since it is divisible by the number (14) 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 1649659704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2585779200).

1649659704 is an abundant number, since it is smaller than the sum of its proper divisors (3521898696).

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

1649659704 is a wasteful number, since it uses less digits than its factorization.

1649659704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5193 (or 5189 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 1649659704 is about 40616.0030529839. The cubic root of 1649659704 is about 1181.5845093007.

The spelling of 1649659704 in words is "one billion, six hundred forty-nine million, six hundred fifty-nine thousand, seven hundred four".