57648820631 has 2 divisors, whose sum is σ = 57648820632. Its totient is φ = 57648820630.

The previous prime is 57648820577. The next prime is 57648820637. The reversal of 57648820631 is 13602884675.

57648820631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57648820631 is a prime.

It is a super-2 number, since 2×57648820631² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57648820631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57648820637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28824410315 + 28824410316.

It is an arithmetic number, because the mean of its divisors is an integer number (28824410316).

Almost surely, 2^57648820631 is an apocalyptic number.

57648820631 is a deficient number, since it is larger than the sum of its proper divisors (1).

57648820631 is an equidigital number, since it uses as much as digits as its factorization.

57648820631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 57648820631 in words is "fifty-seven billion, six hundred forty-eight million, eight hundred twenty thousand, six hundred thirty-one".