51566610121 has 16 divisors (see below), whose sum is σ = 57968265600. Its totient is φ = 45514275840.

The previous prime is 51566610107. The next prime is 51566610157. The reversal of 51566610121 is 12101666515.

It is a cyclic number.

It is not a de Polignac number, because 51566610121 - 2⁷ = 51566609993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51566610191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859305 + ... + 917353.

It is an arithmetic number, because the mean of its divisors is an integer number (3623016600).

Almost surely, 2^51566610121 is an apocalyptic number.

It is an amenable number.

51566610121 is a deficient number, since it is larger than the sum of its proper divisors (6401655479).

51566610121 is a wasteful number, since it uses less digits than its factorization.

51566610121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61056.

The product of its (nonzero) digits is 10800, while the sum is 34.

The spelling of 51566610121 in words is "fifty-one billion, five hundred sixty-six million, six hundred ten thousand, one hundred twenty-one".