123756454990880 has 48 divisors (see below), whose sum is σ = 292378400458200. Its totient is φ = 49501942751232.

The previous prime is 123756454990877. The next prime is 123756454990891. The reversal of 123756454990880 is 88099454657321.

It can be written as a sum of positive squares in 4 ways, for example, as 69386301064336 + 54370153926544 = 8329844^2 + 7373612^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7532762 + ... + 17442918.

It is a 1-persistent number, because it is pandigital, but 2⋅123756454990880 = 247512909981760 is not.

Almost surely, 2^{123756454990880} is an apocalyptic number.

123756454990880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123756454990880 is an abundant number, since it is smaller than the sum of its proper divisors (168621945467320).

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

123756454990880 is an equidigital number, since it uses as much as digits as its factorization.

123756454990880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9988221 (or 9988213 counting only the distinct ones).

The product of its (nonzero) digits is 522547200, while the sum is 71.

The spelling of 123756454990880 in words is "one hundred twenty-three trillion, seven hundred fifty-six billion, four hundred fifty-four million, nine hundred ninety thousand, eight hundred eighty".