55661574124731 has 4 divisors (see below), whose sum is σ = 74215432166312. Its totient is φ = 37107716083152.

The previous prime is 55661574124703. The next prime is 55661574124787. The reversal of 55661574124731 is 13742147516655.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-55661574124731 is a prime.

It is a super-2 number, since 2×55661574124731² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55661574120731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9276929020786 + ... + 9276929020791.

It is an arithmetic number, because the mean of its divisors is an integer number (18553858041578).

Almost surely, 2^{55661574124731} is an apocalyptic number.

55661574124731 is a deficient number, since it is larger than the sum of its proper divisors (18553858041581).

55661574124731 is a wasteful number, since it uses less digits than its factorization.

55661574124731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18553858041580.

The product of its digits is 21168000, while the sum is 57.

The spelling of 55661574124731 in words is "fifty-five trillion, six hundred sixty-one billion, five hundred seventy-four million, one hundred twenty-four thousand, seven hundred thirty-one".