57626787457 has 2 divisors, whose sum is σ = 57626787458. Its totient is φ = 57626787456.

The previous prime is 57626787451. The next prime is 57626787611. The reversal of 57626787457 is 75478762675.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44944424001 + 12682363456 = 212001^2 + 112616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57626787457 is a prime.

It is a super-2 number, since 2×57626787457² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57626787451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28813393728 + 28813393729.

It is an arithmetic number, because the mean of its divisors is an integer number (28813393729).

Almost surely, 2^57626787457 is an apocalyptic number.

It is an amenable number.

57626787457 is a deficient number, since it is larger than the sum of its proper divisors (1).

57626787457 is an equidigital number, since it uses as much as digits as its factorization.

57626787457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138297600, while the sum is 64.

The spelling of 57626787457 in words is "fifty-seven billion, six hundred twenty-six million, seven hundred eighty-seven thousand, four hundred fifty-seven".