123422513136 has 160 divisors (see below), whose sum is σ = 361708515840. Its totient is φ = 35950666752.

The previous prime is 123422513119. The next prime is 123422513197. The reversal of 123422513136 is 631315224321.

It is a junction number, because it is equal to n+sod(n) for n = 123422513097 and 123422513106.

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, 20543445 + ... + 20549451.

It is an arithmetic number, because the mean of its divisors is an integer number (2260678224).

Almost surely, 2^123422513136 is an apocalyptic number.

123422513136 is a gapful number since it is divisible by the number (16) 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 123422513136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180854257920).

123422513136 is an abundant number, since it is smaller than the sum of its proper divisors (238286002704).

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

123422513136 is a wasteful number, since it uses less digits than its factorization.

123422513136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7783 (or 7777 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

Adding to 123422513136 its reverse (631315224321), we get a palindrome (754737737457).

The spelling of 123422513136 in words is "one hundred twenty-three billion, four hundred twenty-two million, five hundred thirteen thousand, one hundred thirty-six".