57121452137 has 2 divisors, whose sum is σ = 57121452138. Its totient is φ = 57121452136.

The previous prime is 57121452103. The next prime is 57121452187. The reversal of 57121452137 is 73125412175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50267433616 + 6854018521 = 224204^2 + 82789^2 .

It is a cyclic number.

It is not a de Polignac number, because 57121452137 - 2¹⁰ = 57121451113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57121452137.

It is not a weakly prime, because it can be changed into another prime (57121452187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28560726068 + 28560726069.

It is an arithmetic number, because the mean of its divisors is an integer number (28560726069).

Almost surely, 2^57121452137 is an apocalyptic number.

It is an amenable number.

57121452137 is a deficient number, since it is larger than the sum of its proper divisors (1).

57121452137 is an equidigital number, since it uses as much as digits as its factorization.

57121452137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58800, while the sum is 38.

The spelling of 57121452137 in words is "fifty-seven billion, one hundred twenty-one million, four hundred fifty-two thousand, one hundred thirty-seven".