56512221565 has 8 divisors (see below), whose sum is σ = 68193519840. Its totient is φ = 44957207952.

The previous prime is 56512221511. The next prime is 56512221589.

56512221565 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56512221565 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31570179 + ... + 31571968.

It is an arithmetic number, because the mean of its divisors is an integer number (8524189980).

Almost surely, 2^56512221565 is an apocalyptic number.

It is an amenable number.

56512221565 is a deficient number, since it is larger than the sum of its proper divisors (11681298275).

56512221565 is a wasteful number, since it uses less digits than its factorization.

56512221565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63142331.

The product of its digits is 180000, while the sum is 40.

The spelling of 56512221565 in words is "fifty-six billion, five hundred twelve million, two hundred twenty-one thousand, five hundred sixty-five".