123365226516 has 72 divisors (see below), whose sum is σ = 345650086656. Its totient is φ = 34110195840.

The previous prime is 123365226473. The next prime is 123365226553. The reversal of 123365226516 is 615622563321.

It is a happy number.

It is a super-2 number, since 2×123365226516² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3365721 + ... + 3402176.

It is an arithmetic number, because the mean of its divisors is an integer number (4800695648).

Almost surely, 2^123365226516 is an apocalyptic number.

It is an amenable number.

123365226516 is an abundant number, since it is smaller than the sum of its proper divisors (222284860140).

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

123365226516 is a wasteful number, since it uses less digits than its factorization.

123365226516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6767949 (or 6767940 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

Adding to 123365226516 its reverse (615622563321), we get a palindrome (738987789837).

The spelling of 123365226516 in words is "one hundred twenty-three billion, three hundred sixty-five million, two hundred twenty-six thousand, five hundred sixteen".