51570666557 has 12 divisors (see below), whose sum is σ = 54790953120. Its totient is φ = 48529768896.

The previous prime is 51570666541. The next prime is 51570666577. The reversal of 51570666557 is 75566607515.

51570666557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51570666557 - 2⁴ = 51570666541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51570666499 and 51570666508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51570666577) 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, 3379178 + ... + 3394404.

It is an arithmetic number, because the mean of its divisors is an integer number (4565912760).

Almost surely, 2^51570666557 is an apocalyptic number.

It is an amenable number.

51570666557 is a deficient number, since it is larger than the sum of its proper divisors (3220286563).

51570666557 is a wasteful number, since it uses less digits than its factorization.

51570666557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26980 (or 26963 counting only the distinct ones).

The product of its (nonzero) digits is 6615000, while the sum is 53.

The spelling of 51570666557 in words is "fifty-one billion, five hundred seventy million, six hundred sixty-six thousand, five hundred fifty-seven".