56125760661 has 24 divisors (see below), whose sum is σ = 87294317760. Its totient is φ = 34619273856.

The previous prime is 56125760609. The next prime is 56125760671. The reversal of 56125760661 is 16606752165.

56125760661 is a `hidden beast` number, since 5 + 6 + 12 + 576 + 0 + 6 + 61 = 666.

It is not a de Polignac number, because 56125760661 - 2¹¹ = 56125758613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56125760671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3099745 + ... + 3117798.

It is an arithmetic number, because the mean of its divisors is an integer number (3637263240).

Almost surely, 2^56125760661 is an apocalyptic number.

56125760661 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56125760661 is a deficient number, since it is larger than the sum of its proper divisors (31168557099).

56125760661 is a wasteful number, since it uses less digits than its factorization.

56125760661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6217625 (or 6217622 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 56125760661 in words is "fifty-six billion, one hundred twenty-five million, seven hundred sixty thousand, six hundred sixty-one".