13568751612 has 156 divisors (see below), whose sum is σ = 38435914776. Its totient is φ = 4166497440.

The previous prime is 13568751607. The next prime is 13568751649. The reversal of 13568751612 is 21615786531.

13568751612 is a `hidden beast` number, since 1 + 3 + 56 + 87 + 516 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (156).

It is a super-2 number, since 2×13568751612² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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 51 ways as a sum of consecutive naturals, for example, 27634687 + ... + 27635177.

Almost surely, 2^13568751612 is an apocalyptic number.

13568751612 is a gapful number since it is divisible by the number (12) 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 13568751612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19217957388).

13568751612 is an abundant number, since it is smaller than the sum of its proper divisors (24867163164).

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

13568751612 is an frugal number, since it uses more digits than its factorization.

13568751612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 509 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The spelling of 13568751612 in words is "thirteen billion, five hundred sixty-eight million, seven hundred fifty-one thousand, six hundred twelve".