51571775577 has 32 divisors (see below), whose sum is σ = 79779105792. Its totient is φ = 29025198144.

The previous prime is 51571775477. The next prime is 51571775623. The reversal of 51571775577 is 77557717515.

It is not a de Polignac number, because 51571775577 - 2²⁰ = 51570727001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51571775377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322398 + ... + 455064.

It is an arithmetic number, because the mean of its divisors is an integer number (2493097056).

Almost surely, 2^51571775577 is an apocalyptic number.

It is an amenable number.

51571775577 is a deficient number, since it is larger than the sum of its proper divisors (28207330215).

51571775577 is a wasteful number, since it uses less digits than its factorization.

51571775577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132957.

The product of its digits is 10504375, while the sum is 57.

The spelling of 51571775577 in words is "fifty-one billion, five hundred seventy-one million, seven hundred seventy-five thousand, five hundred seventy-seven".