57908090881 has 3 divisors (see below), whose sum is σ = 57908331523. Its totient is φ = 57907850240.

The previous prime is 57908090873. The next prime is 57908090893. The reversal of 57908090881 is 18809080975.

The square root of 57908090881 is 240641.

It is a perfect power (a square), and thus also a powerful number.

57908090881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 3114644481 + 54793446400 = 55809^2 + 234080^2 .

It is not a de Polignac number, because 57908090881 - 2³ = 57908090873 is a prime.

It is a super-3 number, since 3×57908090881³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57908096881) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 120321 + ... + 360961.

Almost surely, 2^57908090881 is an apocalyptic number.

57908090881 is the 240641-st square number.

57908090881 is the 120321-st centered octagonal number.

It is an amenable number.

57908090881 is a deficient number, since it is larger than the sum of its proper divisors (240642).

57908090881 is an frugal number, since it uses more digits than its factorization.

57908090881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481282 (or 240641 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 55.

The spelling of 57908090881 in words is "fifty-seven billion, nine hundred eight million, ninety thousand, eight hundred eighty-one".