123351520140 has 96 divisors (see below), whose sum is σ = 383814789120. Its totient is φ = 32889067200.

The previous prime is 123351520037. The next prime is 123351520157. The reversal of 123351520140 is 41025153321.

123351520140 is a `hidden beast` number, since 1 + 2 + 3 + 3 + 515 + 2 + 0 + 140 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5567685 + ... + 5589795.

It is an arithmetic number, because the mean of its divisors is an integer number (3998070720).

Almost surely, 2^123351520140 is an apocalyptic number.

123351520140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123351520140 is an abundant number, since it is smaller than the sum of its proper divisors (260463268980).

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

123351520140 is a wasteful number, since it uses less digits than its factorization.

123351520140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32460 (or 32452 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 123351520140 its reverse (41025153321), we get a palindrome (164376673461).

The spelling of 123351520140 in words is "one hundred twenty-three billion, three hundred fifty-one million, five hundred twenty thousand, one hundred forty".