13612236520 has 64 divisors (see below), whose sum is σ = 31397699520. Its totient is φ = 5308445184.

The previous prime is 13612236509. The next prime is 13612236551. The reversal of 13612236520 is 2563221631.

It is a happy number.

It is a super-3 number, since 3×13612236520³ (a number of 31 digits) contains 333 as substring.

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, 961332 + ... + 975388.

It is an arithmetic number, because the mean of its divisors is an integer number (490589055).

Almost surely, 2^13612236520 is an apocalyptic number.

13612236520 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 13612236520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15698849760).

13612236520 is an abundant number, since it is smaller than the sum of its proper divisors (17785463000).

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

13612236520 is a wasteful number, since it uses less digits than its factorization.

13612236520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14674 (or 14670 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 13612236520 in words is "thirteen billion, six hundred twelve million, two hundred thirty-six thousand, five hundred twenty".