315172351780 has 72 divisors (see below), whose sum is σ = 783462843576. Its totient is φ = 105792107520.

The previous prime is 315172351777. The next prime is 315172351787. The reversal of 315172351780 is 87153271513.

It can be written as a sum of positive squares in 4 ways, for example, as 12648151296 + 302524200484 = 112464^2 + 550022^2 .

It is a super-2 number, since 2×315172351780² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (315172351787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4977637 + ... + 5040556.

It is an arithmetic number, because the mean of its divisors is an integer number (10881428383).

Almost surely, 2^315172351780 is an apocalyptic number.

It is an amenable number.

315172351780 is an abundant number, since it is smaller than the sum of its proper divisors (468290491796).

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

315172351780 is a wasteful number, since it uses less digits than its factorization.

315172351780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10018237 (or 10018224 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 315172351780 in words is "three hundred fifteen billion, one hundred seventy-two million, three hundred fifty-one thousand, seven hundred eighty".