51566056551 has 12 divisors (see below), whose sum is σ = 74528953720. Its totient is φ = 34356763440.

The previous prime is 51566056541. The next prime is 51566056567. The reversal of 51566056551 is 15565066515.

It is not a de Polignac number, because 51566056551 - 2¹⁴ = 51566040167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51566056497 and 51566056506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51566056541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1701445 + ... + 1731486.

Almost surely, 2^51566056551 is an apocalyptic number.

51566056551 is a deficient number, since it is larger than the sum of its proper divisors (22962897169).

51566056551 is a wasteful number, since it uses less digits than its factorization.

51566056551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434606 (or 3434603 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 51566056551 in words is "fifty-one billion, five hundred sixty-six million, fifty-six thousand, five hundred fifty-one".