123427991492 has 48 divisors (see below), whose sum is σ = 235908140160. Its totient is φ = 56160822528.

The previous prime is 123427991483. The next prime is 123427991549. The reversal of 123427991492 is 294199724321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10178609 + ... + 10190727.

It is an arithmetic number, because the mean of its divisors is an integer number (4914752920).

Almost surely, 2^123427991492 is an apocalyptic number.

It is an amenable number.

123427991492 is a deficient number, since it is larger than the sum of its proper divisors (112480148668).

123427991492 is a wasteful number, since it uses less digits than its factorization.

123427991492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14892 (or 14890 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 53.

The spelling of 123427991492 in words is "one hundred twenty-three billion, four hundred twenty-seven million, nine hundred ninety-one thousand, four hundred ninety-two".