56720277015623 has 4 divisors (see below), whose sum is σ = 61083375247608. Its totient is φ = 52357178783640.

The previous prime is 56720277015557. The next prime is 56720277015637. The reversal of 56720277015623 is 32651077202765.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56720277015623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56720277015643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2181549115973 + ... + 2181549115998.

It is an arithmetic number, because the mean of its divisors is an integer number (15270843811902).

Almost surely, 2^{56720277015623} is an apocalyptic number.

56720277015623 is a deficient number, since it is larger than the sum of its proper divisors (4363098231985).

56720277015623 is a wasteful number, since it uses less digits than its factorization.

56720277015623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4363098231984.

The product of its (nonzero) digits is 7408800, while the sum is 53.

The spelling of 56720277015623 in words is "fifty-six trillion, seven hundred twenty billion, two hundred seventy-seven million, fifteen thousand, six hundred twenty-three".