172417258858 has 16 divisors (see below), whose sum is σ = 281391533640. Its totient is φ = 78756811776.

The previous prime is 172417258837. The next prime is 172417258859. The reversal of 172417258858 is 858852714271.

It can be written as a sum of positive squares in 4 ways, for example, as 100677386209 + 71739872649 = 317297^2 + 267843^2 .

It is a super-2 number, since 2×172417258858² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (172417258859) 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, 34180123 + ... + 34185166.

Almost surely, 2^172417258858 is an apocalyptic number.

172417258858 is a deficient number, since it is larger than the sum of its proper divisors (108974274782).

172417258858 is a wasteful number, since it uses less digits than its factorization.

172417258858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68365401.

The product of its digits is 10035200, while the sum is 58.

The spelling of 172417258858 in words is "one hundred seventy-two billion, four hundred seventeen million, two hundred fifty-eight thousand, eight hundred fifty-eight".