123431153772 has 48 divisors (see below), whose sum is σ = 291891353600. Its totient is φ = 40589527680.

The previous prime is 123431153761. The next prime is 123431153849. The reversal of 123431153772 is 277351134321.

It is a self number, because there is not a number n which added to its sum of digits gives 123431153772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114104 + ... + 1219872.

Almost surely, 2^123431153772 is an apocalyptic number.

123431153772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123431153772 is an abundant number, since it is smaller than the sum of its proper divisors (168460199828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123431153772 is a wasteful number, since it uses less digits than its factorization.

123431153772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107086 (or 107084 counting only the distinct ones).

The product of its digits is 105840, while the sum is 39.

The spelling of 123431153772 in words is "one hundred twenty-three billion, four hundred thirty-one million, one hundred fifty-three thousand, seven hundred seventy-two".