51253056657 has 24 divisors (see below), whose sum is σ = 80774355168. Its totient is φ = 31057857600.

The previous prime is 51253056629. The next prime is 51253056671. The reversal of 51253056657 is 75665035215.

51253056657 is a `hidden beast` number, since 5 + 1 + 2 + 5 + 30 + 566 + 57 = 666.

It is not a de Polignac number, because 51253056657 - 2⁶ = 51253056593 is a prime.

It is a super-3 number, since 3×51253056657³ (a number of 33 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51253056157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 706018 + ... + 775220.

It is an arithmetic number, because the mean of its divisors is an integer number (3365598132).

Almost surely, 2^51253056657 is an apocalyptic number.

It is an amenable number.

51253056657 is a deficient number, since it is larger than the sum of its proper divisors (29521298511).

51253056657 is a wasteful number, since it uses less digits than its factorization.

51253056657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76701 (or 76698 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 45.

The spelling of 51253056657 in words is "fifty-one billion, two hundred fifty-three million, fifty-six thousand, six hundred fifty-seven".