56211663465 has 24 divisors (see below), whose sum is σ = 97454897280. Its totient is φ = 29972985504.

The previous prime is 56211663413. The next prime is 56211663581. The reversal of 56211663465 is 56436611265.

56211663465 is a `hidden beast` number, since 5 + 6 + 2 + 1 + 1 + 6 + 634 + 6 + 5 = 666.

It is not a de Polignac number, because 56211663465 - 2¹⁶ = 56211597929 is a prime.

It is a super-2 number, since 2×56211663465² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 56211663465.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74416 + ... + 343454.

It is an arithmetic number, because the mean of its divisors is an integer number (4060620720).

Almost surely, 2^56211663465 is an apocalyptic number.

It is an amenable number.

56211663465 is a deficient number, since it is larger than the sum of its proper divisors (41243233815).

56211663465 is a wasteful number, since it uses less digits than its factorization.

56211663465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273693 (or 273690 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 56211663465 in words is "fifty-six billion, two hundred eleven million, six hundred sixty-three thousand, four hundred sixty-five".