123654520380 has 48 divisors (see below), whose sum is σ = 348759925920. Its totient is φ = 32733846528.

The previous prime is 123654520343. The next prime is 123654520397. The reversal of 123654520380 is 83025456321.

It is a happy number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 7513345 + ... + 7529784.

It is an arithmetic number, because the mean of its divisors is an integer number (7265831790).

Almost surely, 2^123654520380 is an apocalyptic number.

123654520380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123654520380 is an abundant number, since it is smaller than the sum of its proper divisors (225105405540).

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

123654520380 is a wasteful number, since it uses less digits than its factorization.

123654520380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15043278 (or 15043276 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 123654520380 in words is "one hundred twenty-three billion, six hundred fifty-four million, five hundred twenty thousand, three hundred eighty".