57740297981 has 4 divisors (see below), whose sum is σ = 57809119200. Its totient is φ = 57671476764.

The previous prime is 57740297959. The next prime is 57740297987. The reversal of 57740297981 is 18979204775.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57740297981 is a prime.

It is a super-2 number, since 2×57740297981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57740297981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57740297987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34409351 + ... + 34411028.

It is an arithmetic number, because the mean of its divisors is an integer number (14452279800).

Almost surely, 2^57740297981 is an apocalyptic number.

It is an amenable number.

57740297981 is a deficient number, since it is larger than the sum of its proper divisors (68821219).

57740297981 is an equidigital number, since it uses as much as digits as its factorization.

57740297981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68821218.

The product of its (nonzero) digits is 8890560, while the sum is 59.

The spelling of 57740297981 in words is "fifty-seven billion, seven hundred forty million, two hundred ninety-seven thousand, nine hundred eighty-one".