172230521956 has 24 divisors (see below), whose sum is σ = 304964352000. Its totient is φ = 85098957504.

The previous prime is 172230521887. The next prime is 172230521971. The reversal of 172230521956 is 659125032271.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 488685 + ... + 763723.

It is an arithmetic number, because the mean of its divisors is an integer number (12706848000).

Almost surely, 2^172230521956 is an apocalyptic number.

It is an amenable number.

172230521956 is a deficient number, since it is larger than the sum of its proper divisors (132733830044).

172230521956 is a wasteful number, since it uses less digits than its factorization.

172230521956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276891 (or 276889 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 172230521956 in words is "one hundred seventy-two billion, two hundred thirty million, five hundred twenty-one thousand, nine hundred fifty-six".