721722404051 has 16 divisors (see below), whose sum is σ = 791428128000. Its totient is φ = 652700268000.

The previous prime is 721722404047. The next prime is 721722404089. The reversal of 721722404051 is 150404227127.

It is not a de Polignac number, because 721722404051 - 2² = 721722404047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721722404041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14095685 + ... + 14146793.

It is an arithmetic number, because the mean of its divisors is an integer number (49464258000).

Almost surely, 2^721722404051 is an apocalyptic number.

721722404051 is a deficient number, since it is larger than the sum of its proper divisors (69705723949).

721722404051 is a wasteful number, since it uses less digits than its factorization.

721722404051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57770.

The product of its (nonzero) digits is 31360, while the sum is 35.

The spelling of 721722404051 in words is "seven hundred twenty-one billion, seven hundred twenty-two million, four hundred four thousand, fifty-one".