123230132640 has 72 divisors (see below), whose sum is σ = 420522832548. Its totient is φ = 32861368320.

The previous prime is 123230132633. The next prime is 123230132687. The reversal of 123230132640 is 46231032321.

123230132640 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 3 + 0 + 13 + 2 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 100081118736 + 23149013904 = 316356^2 + 152148^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42786801 + ... + 42789680.

Almost surely, 2^123230132640 is an apocalyptic number.

123230132640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123230132640 is an abundant number, since it is smaller than the sum of its proper divisors (297292699908).

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

123230132640 is a wasteful number, since it uses less digits than its factorization.

123230132640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85576502 (or 85576491 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 123230132640 its reverse (46231032321), we get a palindrome (169461164961).

The spelling of 123230132640 in words is "one hundred twenty-three billion, two hundred thirty million, one hundred thirty-two thousand, six hundred forty".