57136306420 has 12 divisors (see below), whose sum is σ = 119986243524. Its totient is φ = 22854522560.

The previous prime is 57136306393. The next prime is 57136306433. The reversal of 57136306420 is 2460363175.

It can be written as a sum of positive squares in 2 ways, for example, as 43933836816 + 13202469604 = 209604^2 + 114902^2 .

It is a super-2 number, since 2×57136306420² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 57136306420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428407641 + ... + 1428407680.

It is an arithmetic number, because the mean of its divisors is an integer number (9998853627).

Almost surely, 2^57136306420 is an apocalyptic number.

It is an amenable number.

57136306420 is an abundant number, since it is smaller than the sum of its proper divisors (62849937104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57136306420 is a wasteful number, since it uses less digits than its factorization.

57136306420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856815330 (or 2856815328 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

Adding to 57136306420 its reverse (2460363175), we get a palindrome (59596669595).

The spelling of 57136306420 in words is "fifty-seven billion, one hundred thirty-six million, three hundred six thousand, four hundred twenty".