51345060431657 has 2 divisors, whose sum is σ = 51345060431658. Its totient is φ = 51345060431656.

The previous prime is 51345060431611. The next prime is 51345060431737. The reversal of 51345060431657 is 75613406054315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50736331227136 + 608729204521 = 7122944^2 + 780211^2 .

It is a cyclic number.

It is not a de Polignac number, because 51345060431657 - 2²² = 51345056237353 is a prime.

It is not a weakly prime, because it can be changed into another prime (51345060431857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25672530215828 + 25672530215829.

It is an arithmetic number, because the mean of its divisors is an integer number (25672530215829).

Almost surely, 2^{51345060431657} is an apocalyptic number.

It is an amenable number.

51345060431657 is a deficient number, since it is larger than the sum of its proper divisors (1).

51345060431657 is an equidigital number, since it uses as much as digits as its factorization.

51345060431657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536000, while the sum is 50.

The spelling of 51345060431657 in words is "fifty-one trillion, three hundred forty-five billion, sixty million, four hundred thirty-one thousand, six hundred fifty-seven".