57946519721 has 2 divisors, whose sum is σ = 57946519722. Its totient is φ = 57946519720.

The previous prime is 57946519711. The next prime is 57946519727. The reversal of 57946519721 is 12791564975.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55321392025 + 2625127696 = 235205^2 + 51236^2 .

It is a cyclic number.

It is not a de Polignac number, because 57946519721 - 2¹⁴ = 57946503337 is a prime.

It is not a weakly prime, because it can be changed into another prime (57946519727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28973259860 + 28973259861.

It is an arithmetic number, because the mean of its divisors is an integer number (28973259861).

Almost surely, 2^57946519721 is an apocalyptic number.

It is an amenable number.

57946519721 is a deficient number, since it is larger than the sum of its proper divisors (1).

57946519721 is an equidigital number, since it uses as much as digits as its factorization.

57946519721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4762800, while the sum is 56.

The spelling of 57946519721 in words is "fifty-seven billion, nine hundred forty-six million, five hundred nineteen thousand, seven hundred twenty-one".