325638638556 has 48 divisors (see below), whose sum is σ = 947312405760. Its totient is φ = 84581464320.

The previous prime is 325638638551. The next prime is 325638638587. The reversal of 325638638556 is 655836836523.

It is a self number, because there is not a number n which added to its sum of digits gives 325638638556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (325638638551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176210461 + ... + 176212308.

It is an arithmetic number, because the mean of its divisors is an integer number (19735675120).

Almost surely, 2^325638638556 is an apocalyptic number.

It is an amenable number.

325638638556 is an abundant number, since it is smaller than the sum of its proper divisors (621673767204).

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

325638638556 is a wasteful number, since it uses less digits than its factorization.

325638638556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352422794 (or 352422792 counting only the distinct ones).

The product of its digits is 93312000, while the sum is 60.

The spelling of 325638638556 in words is "three hundred twenty-five billion, six hundred thirty-eight million, six hundred thirty-eight thousand, five hundred fifty-six".