56168697321 has 32 divisors (see below), whose sum is σ = 92316326400. Its totient is φ = 33464647440.

The previous prime is 56168697253. The next prime is 56168697329. The reversal of 56168697321 is 12379686165.

56168697321 is a `hidden beast` number, since 561 + 6 + 8 + 6 + 9 + 73 + 2 + 1 = 666.

It is not a de Polignac number, because 56168697321 - 2¹¹ = 56168695273 is a prime.

It is a super-2 number, since 2×56168697321² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56168697329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1585191 + ... + 1620236.

It is an arithmetic number, because the mean of its divisors is an integer number (2884885200).

Almost surely, 2^56168697321 is an apocalyptic number.

It is an amenable number.

56168697321 is a deficient number, since it is larger than the sum of its proper divisors (36147629079).

56168697321 is a wasteful number, since it uses less digits than its factorization.

56168697321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3205506 (or 3205500 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 56168697321 in words is "fifty-six billion, one hundred sixty-eight million, six hundred ninety-seven thousand, three hundred twenty-one".