56720277015621 has 8 divisors (see below), whose sum is σ = 75627103056864. Its totient is φ = 37813484492400.

The previous prime is 56720277015557. The next prime is 56720277015637. The reversal of 56720277015621 is 12651077202765.

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

It is not a de Polignac number, because 56720277015621 - 2⁶ = 56720277015557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56720272015621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4121926 + ... + 11420631.

It is an arithmetic number, because the mean of its divisors is an integer number (9453387882108).

Almost surely, 2^{56720277015621} is an apocalyptic number.

It is an amenable number.

56720277015621 is a deficient number, since it is larger than the sum of its proper divisors (18906826041243).

56720277015621 is a wasteful number, since it uses less digits than its factorization.

56720277015621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16759011.

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 56720277015621 in words is "fifty-six trillion, seven hundred twenty billion, two hundred seventy-seven million, fifteen thousand, six hundred twenty-one".