551503313361 has 160 divisors (see below), whose sum is σ = 1109756583936. Its totient is φ = 263594736000.

The previous prime is 551503313323. The next prime is 551503313377. The reversal of 551503313361 is 163313305155.

551503313361 is a `hidden beast` number, since 5 + 515 + 0 + 3 + 3 + 133 + 6 + 1 = 666.

It is not a de Polignac number, because 551503313361 - 2³⁵ = 517143574993 is a prime.

It is a super-2 number, since 2×551503313361² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (551503313381) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 25205256 + ... + 25227126.

Almost surely, 2^551503313361 is an apocalyptic number.

It is an amenable number.

551503313361 is an abundant number, since it is smaller than the sum of its proper divisors (558253270575).

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

551503313361 is a wasteful number, since it uses less digits than its factorization.

551503313361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22225 (or 22216 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 36.

The spelling of 551503313361 in words is "five hundred fifty-one billion, five hundred three million, three hundred thirteen thousand, three hundred sixty-one".