551777130657 has 6 divisors (see below), whose sum is σ = 797011410962. Its totient is φ = 367851420432.

The previous prime is 551777130623. The next prime is 551777130679. The reversal of 551777130657 is 756031777155.

551777130657 is a `hidden beast` number, since 5 + 517 + 7 + 71 + 3 + 0 + 6 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 519104399121 + 32672731536 = 720489^2 + 180756^2 .

It is a de Polignac number, because none of the positive numbers 2^k-551777130657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551777130257) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 30654285028 + ... + 30654285045.

Almost surely, 2^551777130657 is an apocalyptic number.

It is an amenable number.

551777130657 is a deficient number, since it is larger than the sum of its proper divisors (245234280305).

551777130657 is a wasteful number, since it uses less digits than its factorization.

551777130657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61308570079 (or 61308570076 counting only the distinct ones).

The product of its (nonzero) digits is 5402250, while the sum is 54.

The spelling of 551777130657 in words is "five hundred fifty-one billion, seven hundred seventy-seven million, one hundred thirty thousand, six hundred fifty-seven".