57523927781 has 2 divisors, whose sum is σ = 57523927782. Its totient is φ = 57523927780.

The previous prime is 57523927757. The next prime is 57523927801. The reversal of 57523927781 is 18772932575.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43959831556 + 13564096225 = 209666^2 + 116465^2 .

It is a cyclic number.

It is not a de Polignac number, because 57523927781 - 2¹⁸ = 57523665637 is a prime.

It is a super-2 number, since 2×57523927781² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57523927381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28761963890 + 28761963891.

It is an arithmetic number, because the mean of its divisors is an integer number (28761963891).

Almost surely, 2^57523927781 is an apocalyptic number.

It is an amenable number.

57523927781 is a deficient number, since it is larger than the sum of its proper divisors (1).

57523927781 is an equidigital number, since it uses as much as digits as its factorization.

57523927781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7408800, while the sum is 56.

The spelling of 57523927781 in words is "fifty-seven billion, five hundred twenty-three million, nine hundred twenty-seven thousand, seven hundred eighty-one".