325816139556 has 120 divisors (see below), whose sum is σ = 908340824160. Its totient is φ = 101481216768.

The previous prime is 325816139503. The next prime is 325816139557. The reversal of 325816139556 is 655931618523.

325816139556 is a `hidden beast` number, since 3 + 2 + 5 + 81 + 6 + 1 + 3 + 9 + 556 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (325816139557) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 552831 + ... + 978393.

It is an arithmetic number, because the mean of its divisors is an integer number (7569506868).

Almost surely, 2^325816139556 is an apocalyptic number.

325816139556 is a gapful number since it is divisible by the number (36) 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 325816139556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (454170412080).

325816139556 is an abundant number, since it is smaller than the sum of its proper divisors (582524684604).

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

325816139556 is a wasteful number, since it uses less digits than its factorization.

325816139556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425735 (or 425724 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The spelling of 325816139556 in words is "three hundred twenty-five billion, eight hundred sixteen million, one hundred thirty-nine thousand, five hundred fifty-six".