172989624564 has 48 divisors (see below), whose sum is σ = 448627515840. Its totient is φ = 57645735840.

The previous prime is 172989624559. The next prime is 172989624581. The reversal of 172989624564 is 465426989271.

172989624564 is a `hidden beast` number, since 1 + 7 + 2 + 9 + 8 + 9 + 62 + 4 + 564 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117874 + ... + 599894.

It is an arithmetic number, because the mean of its divisors is an integer number (9346406580).

Almost surely, 2^172989624564 is an apocalyptic number.

It is an amenable number.

172989624564 is an abundant number, since it is smaller than the sum of its proper divisors (275637891276).

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

172989624564 is a wasteful number, since it uses less digits than its factorization.

172989624564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485357 (or 485349 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 63.

The spelling of 172989624564 in words is "one hundred seventy-two billion, nine hundred eighty-nine million, six hundred twenty-four thousand, five hundred sixty-four".