325653920640 has 128 divisors (see below), whose sum is σ = 1153357696800. Its totient is φ = 86841040896.

The previous prime is 325653920617. The next prime is 325653920651. The reversal of 325653920640 is 46029356523.

325653920640 is a `hidden beast` number, since 3 + 2 + 56 + 539 + 2 + 0 + 64 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9405577 + ... + 9440136.

Almost surely, 2^325653920640 is an apocalyptic number.

325653920640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

325653920640 is an abundant number, since it is smaller than the sum of its proper divisors (827703776160).

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

325653920640 is a wasteful number, since it uses less digits than its factorization.

325653920640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18845741 (or 18845723 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The spelling of 325653920640 in words is "three hundred twenty-five billion, six hundred fifty-three million, nine hundred twenty thousand, six hundred forty".