13191697872 has 120 divisors (see below), whose sum is σ = 39225569760. Its totient is φ = 4126775040.

The previous prime is 13191697847. The next prime is 13191697873. The reversal of 13191697872 is 27879619131.

It is a happy number.

It is a super-2 number, since 2×13191697872² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13191697873) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270222 + ... + 315282.

It is an arithmetic number, because the mean of its divisors is an integer number (326879748).

Almost surely, 2^13191697872 is an apocalyptic number.

13191697872 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 13191697872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19612784880).

13191697872 is an abundant number, since it is smaller than the sum of its proper divisors (26033871888).

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

13191697872 is a wasteful number, since it uses less digits than its factorization.

13191697872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45201 (or 45192 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The spelling of 13191697872 in words is "thirteen billion, one hundred ninety-one million, six hundred ninety-seven thousand, eight hundred seventy-two".