57581680620781 has 2 divisors, whose sum is σ = 57581680620782. Its totient is φ = 57581680620780.

The previous prime is 57581680620731. The next prime is 57581680620791. The reversal of 57581680620781 is 18702608618575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55554215040900 + 2027465579881 = 7453470^2 + 1423891^2 .

It is a cyclic number.

It is not a de Polignac number, because 57581680620781 - 2³⁵ = 57547320882413 is a prime.

It is a super-2 number, since 2×57581680620781² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57581680620721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28790840310390 + 28790840310391.

It is an arithmetic number, because the mean of its divisors is an integer number (28790840310391).

Almost surely, 2^{57581680620781} is an apocalyptic number.

It is an amenable number.

57581680620781 is a deficient number, since it is larger than the sum of its proper divisors (1).

57581680620781 is an equidigital number, since it uses as much as digits as its factorization.

57581680620781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45158400, while the sum is 64.

The spelling of 57581680620781 in words is "fifty-seven trillion, five hundred eighty-one billion, six hundred eighty million, six hundred twenty thousand, seven hundred eighty-one".