123257631432 has 256 divisors, whose sum is σ = 347204309760. Its totient is φ = 36215230464.

The previous prime is 123257631397. The next prime is 123257631451. The reversal of 123257631432 is 234136752321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 188755618 + ... + 188756270.

It is an arithmetic number, because the mean of its divisors is an integer number (1356266835).

Almost surely, 2^123257631432 is an apocalyptic number.

123257631432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123257631432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173602154880).

123257631432 is an abundant number, since it is smaller than the sum of its proper divisors (223946678328).

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

123257631432 is a wasteful number, since it uses less digits than its factorization.

123257631432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 988 counting only the distinct ones).

The product of its digits is 181440, while the sum is 39.

The spelling of 123257631432 in words is "one hundred twenty-three billion, two hundred fifty-seven million, six hundred thirty-one thousand, four hundred thirty-two".