57440072281 has 32 divisors (see below), whose sum is σ = 63632793600. Its totient is φ = 51606434880.

The previous prime is 57440072279. The next prime is 57440072299. The reversal of 57440072281 is 18227004475.

It is a cyclic number.

It is not a de Polignac number, because 57440072281 - 2¹ = 57440072279 is a prime.

It is a super-2 number, since 2×57440072281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57440072231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62502340 + ... + 62503258.

It is an arithmetic number, because the mean of its divisors is an integer number (1988524800).

Almost surely, 2^57440072281 is an apocalyptic number.

It is an amenable number.

57440072281 is a deficient number, since it is larger than the sum of its proper divisors (6192721319).

57440072281 is a wasteful number, since it uses less digits than its factorization.

57440072281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029.

The product of its (nonzero) digits is 125440, while the sum is 40.

The spelling of 57440072281 in words is "fifty-seven billion, four hundred forty million, seventy-two thousand, two hundred eighty-one".