123344553540 has 96 divisors (see below), whose sum is σ = 376110483840. Its totient is φ = 30020576256.

The previous prime is 123344553517. The next prime is 123344553589. The reversal of 123344553540 is 45355443321.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 818974 + ... + 957813.

It is an arithmetic number, because the mean of its divisors is an integer number (3917817540).

Almost surely, 2^123344553540 is an apocalyptic number.

123344553540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123344553540 is an abundant number, since it is smaller than the sum of its proper divisors (252765930300).

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

123344553540 is a wasteful number, since it uses less digits than its factorization.

123344553540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776901 (or 1776899 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 39.

Adding to 123344553540 its reverse (45355443321), we get a palindrome (168699996861).

The spelling of 123344553540 in words is "one hundred twenty-three billion, three hundred forty-four million, five hundred fifty-three thousand, five hundred forty".