57949023721 has 2 divisors, whose sum is σ = 57949023722. Its totient is φ = 57949023720.

The previous prime is 57949023707. The next prime is 57949023793. The reversal of 57949023721 is 12732094975.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48724381696 + 9224642025 = 220736^2 + 96045^2 .

It is a cyclic number.

It is not a de Polignac number, because 57949023721 - 2³⁵ = 23589285353 is a prime.

It is not a weakly prime, because it can be changed into another prime (57949023701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28974511860 + 28974511861.

It is an arithmetic number, because the mean of its divisors is an integer number (28974511861).

Almost surely, 2^57949023721 is an apocalyptic number.

It is an amenable number.

57949023721 is a deficient number, since it is larger than the sum of its proper divisors (1).

57949023721 is an equidigital number, since it uses as much as digits as its factorization.

57949023721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 57949023721 in words is "fifty-seven billion, nine hundred forty-nine million, twenty-three thousand, seven hundred twenty-one".