123864811071240 has 128 divisors (see below), whose sum is σ = 381661513349760. Its totient is φ = 32135876941824.

The previous prime is 123864811071233. The next prime is 123864811071247. The reversal of 123864811071240 is 42170118468321.

It is an interprime number because it is at equal distance from previous prime (123864811071233) and next prime (123864811071247).

It is a self number, because there is not a number n which added to its sum of digits gives 123864811071240.

It is not an unprimeable number, because it can be changed into a prime (123864811071247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70424379 + ... + 72161781.

It is an arithmetic number, because the mean of its divisors is an integer number (2981730573045).

Almost surely, 2^{123864811071240} is an apocalyptic number.

123864811071240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123864811071240 is an abundant number, since it is smaller than the sum of its proper divisors (257796702278520).

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

123864811071240 is a wasteful number, since it uses less digits than its factorization.

123864811071240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753511 (or 1753507 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 123864811071240 in words is "one hundred twenty-three trillion, eight hundred sixty-four billion, eight hundred eleven million, seventy-one thousand, two hundred forty".