51602605257 has 24 divisors (see below), whose sum is σ = 80210414592. Its totient is φ = 29423200800.

The previous prime is 51602605253. The next prime is 51602605261. The reversal of 51602605257 is 75250620615.

It is an interprime number because it is at equal distance from previous prime (51602605253) and next prime (51602605261).

It is not a de Polignac number, because 51602605257 - 2² = 51602605253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51602605253) 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 23 ways as a sum of consecutive naturals, for example, 312969 + ... + 448502.

It is an arithmetic number, because the mean of its divisors is an integer number (3342100608).

Almost surely, 2^51602605257 is an apocalyptic number.

It is an amenable number.

51602605257 is a deficient number, since it is larger than the sum of its proper divisors (28607809335).

51602605257 is a wasteful number, since it uses less digits than its factorization.

51602605257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761949 (or 761942 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 51602605257 in words is "fifty-one billion, six hundred two million, six hundred five thousand, two hundred fifty-seven".