13491643752 has 96 divisors (see below), whose sum is σ = 37206468000. Its totient is φ = 4415368320.

The previous prime is 13491643729. The next prime is 13491643771. The reversal of 13491643752 is 25734619431.

13491643752 is a `hidden beast` number, since 134 + 91 + 64 + 375 + 2 = 666.

It is a super-2 number, since 2×13491643752² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13491643698 and 13491643707.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4539627 + ... + 4542597.

It is an arithmetic number, because the mean of its divisors is an integer number (387567375).

Almost surely, 2^13491643752 is an apocalyptic number.

13491643752 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 13491643752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18603234000).

13491643752 is an abundant number, since it is smaller than the sum of its proper divisors (23714824248).

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

13491643752 is a wasteful number, since it uses less digits than its factorization.

13491643752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4111 (or 4104 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The spelling of 13491643752 in words is "thirteen billion, four hundred ninety-one million, six hundred forty-three thousand, seven hundred fifty-two".