123740297652440 has 64 divisors (see below), whose sum is σ = 321005171741760. Its totient is φ = 42049800253440.

The previous prime is 123740297652383. The next prime is 123740297652451. The reversal of 123740297652440 is 44256792047321.

It is a happy number.

It is a super-2 number, since 2×123740297652440² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955409221 + ... + 1955472500.

It is an arithmetic number, because the mean of its divisors is an integer number (5015705808465).

Almost surely, 2^{123740297652440} is an apocalyptic number.

123740297652440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123740297652440 is an abundant number, since it is smaller than the sum of its proper divisors (197264874089320).

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

123740297652440 is a wasteful number, since it uses less digits than its factorization.

123740297652440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910881852 (or 3910881848 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 56.

The spelling of 123740297652440 in words is "one hundred twenty-three trillion, seven hundred forty billion, two hundred ninety-seven million, six hundred fifty-two thousand, four hundred forty".