172100858428 has 24 divisors (see below), whose sum is σ = 306184951520. Its totient is φ = 84620099520.

The previous prime is 172100858417. The next prime is 172100858513. The reversal of 172100858428 is 824858001271.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999478 + ... + 1158946.

Almost surely, 2^172100858428 is an apocalyptic number.

It is an amenable number.

172100858428 is a deficient number, since it is larger than the sum of its proper divisors (134084093092).

172100858428 is a wasteful number, since it uses less digits than its factorization.

172100858428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163957 (or 163955 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 46.

Adding to 172100858428 its reverse (824858001271), we get a palindrome (996958859699).

The spelling of 172100858428 in words is "one hundred seventy-two billion, one hundred million, eight hundred fifty-eight thousand, four hundred twenty-eight".