123645902432 has 96 divisors (see below), whose sum is σ = 271771718400. Its totient is φ = 54981900288.

The previous prime is 123645902411. The next prime is 123645902459. The reversal of 123645902432 is 234209546321.

It is a self number, because there is not a number n which added to its sum of digits gives 123645902432.

It is a congruent number.

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, 5767958 + ... + 5789354.

It is an arithmetic number, because the mean of its divisors is an integer number (2830955400).

Almost surely, 2^123645902432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123645902432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135885859200).

123645902432 is an abundant number, since it is smaller than the sum of its proper divisors (148125815968).

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

123645902432 is a wasteful number, since it uses less digits than its factorization.

123645902432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21928 (or 21920 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 123645902432 in words is "one hundred twenty-three billion, six hundred forty-five million, nine hundred two thousand, four hundred thirty-two".