11722715990 has 64 divisors (see below), whose sum is σ = 21783686400. Its totient is φ = 4540563456.

The previous prime is 11722715909. The next prime is 11722716011. The reversal of 11722715990 is 9951722711.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9631862 + ... + 9633078.

It is an arithmetic number, because the mean of its divisors is an integer number (340370100).

Almost surely, 2^11722715990 is an apocalyptic number.

11722715990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11722715990 is a deficient number, since it is larger than the sum of its proper divisors (10060970410).

11722715990 is a wasteful number, since it uses less digits than its factorization.

11722715990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529.

The product of its (nonzero) digits is 79380, while the sum is 44.

The spelling of 11722715990 in words is "eleven billion, seven hundred twenty-two million, seven hundred fifteen thousand, nine hundred ninety".