13512139776 has 264 divisors, whose sum is σ = 40244347520. Its totient is φ = 4364845056.

The previous prime is 13512139759. The next prime is 13512139783. The reversal of 13512139776 is 67793121531.

13512139776 is a `hidden beast` number, since 135 + 121 + 397 + 7 + 6 = 666.

It is a super-2 number, since 2×13512139776² (a number of 21 digits) contains 22 as substring.

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, 48780150 + ... + 48780426.

Almost surely, 2^13512139776 is an apocalyptic number.

13512139776 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 13512139776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20122173760).

13512139776 is an abundant number, since it is smaller than the sum of its proper divisors (26732207744).

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

13512139776 is a wasteful number, since it uses less digits than its factorization.

13512139776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 428 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The spelling of 13512139776 in words is "thirteen billion, five hundred twelve million, one hundred thirty-nine thousand, seven hundred seventy-six".