123139142352 has 40 divisors (see below), whose sum is σ = 353454946880. Its totient is φ = 41046380640.

The previous prime is 123139142333. The next prime is 123139142383. The reversal of 123139142352 is 253241931321.

123139142352 is a `hidden beast` number, since 1 + 2 + 31 + 391 + 4 + 235 + 2 = 666.

It is a super-2 number, since 2×123139142352² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142521724 + ... + 142522587.

It is an arithmetic number, because the mean of its divisors is an integer number (8836373672).

Almost surely, 2^123139142352 is an apocalyptic number.

123139142352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123139142352 is an abundant number, since it is smaller than the sum of its proper divisors (230315804528).

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

123139142352 is a wasteful number, since it uses less digits than its factorization.

123139142352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285044328 (or 285044316 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The spelling of 123139142352 in words is "one hundred twenty-three billion, one hundred thirty-nine million, one hundred forty-two thousand, three hundred fifty-two".