172031564560 has 40 divisors (see below), whose sum is σ = 400293855000. Its totient is φ = 68757491712.

The previous prime is 172031564557. The next prime is 172031564561. The reversal of 172031564560 is 65465130271.

It can be written as a sum of positive squares in 4 ways, for example, as 23735716096 + 148295848464 = 154064^2 + 385092^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×172031564560² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (172031564561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760927 + ... + 960766.

It is an arithmetic number, because the mean of its divisors is an integer number (10007346375).

Almost surely, 2^172031564560 is an apocalyptic number.

172031564560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172031564560 is an abundant number, since it is smaller than the sum of its proper divisors (228262290440).

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

172031564560 is a wasteful number, since it uses less digits than its factorization.

172031564560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722955 (or 1722949 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 172031564560 in words is "one hundred seventy-two billion, thirty-one million, five hundred sixty-four thousand, five hundred sixty".