57439791556 has 243 divisors, whose sum is σ = 133615731879. Its totient is φ = 21535428096.

The previous prime is 57439791527. The next prime is 57439791571. The reversal of 57439791556 is 65519793475.

It is a happy number.

The square root of 57439791556 is 239666.

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

It can be written as a sum of positive squares in 4 ways, for example, as 14391841156 + 43047950400 = 119966^2 + 207480^2 .

It is a super-2 number, since 2×57439791556² (a number of 22 digits) contains 22 as substring.

Its product of digits (35721000) is a multiple of the sum of its prime divisors (98).

It is a junction number, because it is equal to n+sod(n) for n = 57439791494 and 57439791503.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1083769626 + ... + 1083769678.

Almost surely, 2^57439791556 is an apocalyptic number.

57439791556 is the 239666-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57439791556

57439791556 is an abundant number, since it is smaller than the sum of its proper divisors (76175940323).

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

57439791556 is a wasteful number, since it uses less digits than its factorization.

57439791556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 98 counting only the distinct ones).

The product of its digits is 35721000, while the sum is 61.

The spelling of 57439791556 in words is "fifty-seven billion, four hundred thirty-nine million, seven hundred ninety-one thousand, five hundred fifty-six".