56516185791265 has 32 divisors (see below), whose sum is σ = 69899975228160. Its totient is φ = 43834686361344.

The previous prime is 56516185791239. The next prime is 56516185791269. The reversal of 56516185791265 is 56219758161565.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 56516185791265 - 2¹⁵ = 56516185758497 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 56516185791265.

It is not an unprimeable number, because it can be changed into a prime (56516185791269) 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, 193695556 + ... + 193987114.

It is an arithmetic number, because the mean of its divisors is an integer number (2184374225880).

Almost surely, 2^{56516185791265} is an apocalyptic number.

It is an amenable number.

56516185791265 is a deficient number, since it is larger than the sum of its proper divisors (13383789436895).

56516185791265 is a wasteful number, since it uses less digits than its factorization.

56516185791265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295321.

The product of its digits is 136080000, while the sum is 67.

The spelling of 56516185791265 in words is "fifty-six trillion, five hundred sixteen billion, one hundred eighty-five million, seven hundred ninety-one thousand, two hundred sixty-five".