57404256493 has 2 divisors, whose sum is σ = 57404256494. Its totient is φ = 57404256492.

The previous prime is 57404256457. The next prime is 57404256527. The reversal of 57404256493 is 39465240475.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54904456489 + 2499800004 = 234317^2 + 49998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57404256493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57404256433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28702128246 + 28702128247.

It is an arithmetic number, because the mean of its divisors is an integer number (28702128247).

Almost surely, 2^57404256493 is an apocalyptic number.

It is an amenable number.

57404256493 is a deficient number, since it is larger than the sum of its proper divisors (1).

57404256493 is an equidigital number, since it uses as much as digits as its factorization.

57404256493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 57404256493 in words is "fifty-seven billion, four hundred four million, two hundred fifty-six thousand, four hundred ninety-three".