551465166520 has 64 divisors (see below), whose sum is σ = 1315439251200. Its totient is φ = 207700899840.

The previous prime is 551465166503. The next prime is 551465166541. The reversal of 551465166520 is 25661564155.

It is a happy number.

It is a super-2 number, since 2×551465166520² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5963985 + ... + 6055744.

It is an arithmetic number, because the mean of its divisors is an integer number (20553738300).

Almost surely, 2^551465166520 is an apocalyptic number.

It is an amenable number.

551465166520 is an abundant number, since it is smaller than the sum of its proper divisors (763974084680).

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

551465166520 is a wasteful number, since it uses less digits than its factorization.

551465166520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12019808 (or 12019804 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 46.

The spelling of 551465166520 in words is "five hundred fifty-one billion, four hundred sixty-five million, one hundred sixty-six thousand, five hundred twenty".