123061612710640 has 160 divisors (see below), whose sum is σ = 301545624219840. Its totient is φ = 46644238540800.

The previous prime is 123061612710623. The next prime is 123061612710661. The reversal of 123061612710640 is 46017216160321.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 123061612710593 and 123061612710602.

It is a congruent number.

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, 68408626 + ... + 70184494.

It is an arithmetic number, because the mean of its divisors is an integer number (1884660151374).

Almost surely, 2^{123061612710640} is an apocalyptic number.

123061612710640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123061612710640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150772812109920).

123061612710640 is an abundant number, since it is smaller than the sum of its proper divisors (178484011509200).

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

123061612710640 is a wasteful number, since it uses less digits than its factorization.

123061612710640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1776531 (or 1776525 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

Adding to 123061612710640 its reverse (46017216160321), we get a palindrome (169078828870961).

The spelling of 123061612710640 in words is "one hundred twenty-three trillion, sixty-one billion, six hundred twelve million, seven hundred ten thousand, six hundred forty".