12491797922 has 6 divisors (see below), whose sum is σ = 18737933979. Its totient is φ = 6245819930.

The previous prime is 12491797919. The next prime is 12491797949. The reversal of 12491797922 is 22979719421.

It can be written as a sum of positive squares in only one way, i.e., 6245898961 + 6245898961 = 79031^2 + 79031^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=79031.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 118547 + ... + 197577.

Almost surely, 2^12491797922 is an apocalyptic number.

12491797922 is a deficient number, since it is larger than the sum of its proper divisors (6246136057).

12491797922 is an frugal number, since it uses more digits than its factorization.

12491797922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158064 (or 79033 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 53.

The spelling of 12491797922 in words is "twelve billion, four hundred ninety-one million, seven hundred ninety-seven thousand, nine hundred twenty-two".