56611437818 has 12 divisors (see below), whose sum is σ = 91951714638. Its totient is φ = 26128355760.

The previous prime is 56611437793. The next prime is 56611437829. The reversal of 56611437818 is 81873411665.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 9971420449 + 46640017369 = 99857^2 + 215963^2 .

It is a super-2 number, since 2×56611437818² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83744393 + ... + 83745068.

Almost surely, 2^56611437818 is an apocalyptic number.

56611437818 is a deficient number, since it is larger than the sum of its proper divisors (35340276820).

56611437818 is a wasteful number, since it uses less digits than its factorization.

56611437818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167489489 (or 167489476 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The spelling of 56611437818 in words is "fifty-six billion, six hundred eleven million, four hundred thirty-seven thousand, eight hundred eighteen".