551637149172 has 24 divisors (see below), whose sum is σ = 1287246252096. Its totient is φ = 183865777728.

The previous prime is 551637149159. The next prime is 551637149213. The reversal of 551637149172 is 271941736155.

It is a super-2 number, since 2×551637149172² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1485088 + ... + 1818999.

It is an arithmetic number, because the mean of its divisors is an integer number (53635260504).

Almost surely, 2^551637149172 is an apocalyptic number.

It is an amenable number.

551637149172 is an abundant number, since it is smaller than the sum of its proper divisors (735609102924).

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

551637149172 is a wasteful number, since it uses less digits than its factorization.

551637149172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3318007 (or 3318005 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 51.

The spelling of 551637149172 in words is "five hundred fifty-one billion, six hundred thirty-seven million, one hundred forty-nine thousand, one hundred seventy-two".