172217715687604 has 12 divisors (see below), whose sum is σ = 301425978026628. Its totient is φ = 86096007680000.

The previous prime is 172217715687559. The next prime is 172217715687607. The reversal of 172217715687604 is 406786517712271.

It can be written as a sum of positive squares in 2 ways, for example, as 111737542077604 + 60480173610000 = 10570598^2 + 7776900^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172217715687607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3212510797 + ... + 3212564404.

It is an arithmetic number, because the mean of its divisors is an integer number (25118831502219).

Almost surely, 2^{172217715687604} is an apocalyptic number.

It is an amenable number.

172217715687604 is a deficient number, since it is larger than the sum of its proper divisors (129208262339024).

172217715687604 is a wasteful number, since it uses less digits than its factorization.

172217715687604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6425081906 (or 6425081904 counting only the distinct ones).

The product of its (nonzero) digits is 55319040, while the sum is 64.

The spelling of 172217715687604 in words is "one hundred seventy-two trillion, two hundred seventeen billion, seven hundred fifteen million, six hundred eighty-seven thousand, six hundred four".