13664736813912 has 128 divisors (see below), whose sum is σ = 35038327541760. Its totient is φ = 4439209582080.

The previous prime is 13664736813911. The next prime is 13664736813997. The reversal of 13664736813912 is 21931863746631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664736813911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 876892473 + ... + 876908055.

It is an arithmetic number, because the mean of its divisors is an integer number (273736933920).

Almost surely, 2^{13664736813912} is an apocalyptic number.

13664736813912 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 13664736813912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17519163770880).

13664736813912 is an abundant number, since it is smaller than the sum of its proper divisors (21373590727848).

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

13664736813912 is a wasteful number, since it uses less digits than its factorization.

13664736813912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20193 (or 20189 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 60.

The spelling of 13664736813912 in words is "thirteen trillion, six hundred sixty-four billion, seven hundred thirty-six million, eight hundred thirteen thousand, nine hundred twelve".