57958953721 has 2 divisors, whose sum is σ = 57958953722. Its totient is φ = 57958953720.

The previous prime is 57958953713. The next prime is 57958953749. The reversal of 57958953721 is 12735985975.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32811337321 + 25147616400 = 181139^2 + 158580^2 .

It is a cyclic number.

It is not a de Polignac number, because 57958953721 - 2³ = 57958953713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57958953721.

It is not a weakly prime, because it can be changed into another prime (57958956721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28979476860 + 28979476861.

It is an arithmetic number, because the mean of its divisors is an integer number (28979476861).

Almost surely, 2^57958953721 is an apocalyptic number.

It is an amenable number.

57958953721 is a deficient number, since it is larger than the sum of its proper divisors (1).

57958953721 is an equidigital number, since it uses as much as digits as its factorization.

57958953721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814000, while the sum is 61.

The spelling of 57958953721 in words is "fifty-seven billion, nine hundred fifty-eight million, nine hundred fifty-three thousand, seven hundred twenty-one".