123792551838 has 96 divisors (see below), whose sum is σ = 285310771200. Its totient is φ = 38657399040.

The previous prime is 123792551837. The next prime is 123792551903. The reversal of 123792551838 is 838155297321.

123792551838 is a `hidden beast` number, since 1 + 2 + 3 + 7 + 9 + 2 + 551 + 83 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123792551837) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78998931 + ... + 79000497.

It is an arithmetic number, because the mean of its divisors is an integer number (2971987200).

Almost surely, 2^123792551838 is an apocalyptic number.

123792551838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123792551838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142655385600).

123792551838 is an abundant number, since it is smaller than the sum of its proper divisors (161518219362).

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

123792551838 is a wasteful number, since it uses less digits than its factorization.

123792551838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2622 (or 2619 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 123792551838 in words is "one hundred twenty-three billion, seven hundred ninety-two million, five hundred fifty-one thousand, eight hundred thirty-eight".