123968431615 has 32 divisors (see below), whose sum is σ = 175618473984. Its totient is φ = 82208373120.

The previous prime is 123968431579. The next prime is 123968431621. The reversal of 123968431615 is 516134869321.

It is not a de Polignac number, because 123968431615 - 2²¹ = 123966334463 is a prime.

It is a congruent number.

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, 1574977 + ... + 1651813.

It is an arithmetic number, because the mean of its divisors is an integer number (5488077312).

Almost surely, 2^123968431615 is an apocalyptic number.

123968431615 is a deficient number, since it is larger than the sum of its proper divisors (51650042369).

123968431615 is a wasteful number, since it uses less digits than its factorization.

123968431615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78367.

The product of its digits is 933120, while the sum is 49.

The spelling of 123968431615 in words is "one hundred twenty-three billion, nine hundred sixty-eight million, four hundred thirty-one thousand, six hundred fifteen".