13391576640 has 224 divisors, whose sum is σ = 50876972160. Its totient is φ = 3296360448.

The previous prime is 13391576629. The next prime is 13391576641. The reversal of 13391576640 is 4667519331.

It is a happy number.

13391576640 is a `hidden beast` number, since 1 + 3 + 39 + 1 + 576 + 6 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (13391576641) 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, 52707 + ... + 171933.

It is an arithmetic number, because the mean of its divisors is an integer number (227129340).

Almost surely, 2^13391576640 is an apocalyptic number.

13391576640 is a gapful number since it is divisible by the number (10) 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 13391576640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25438486080).

13391576640 is an abundant number, since it is smaller than the sum of its proper divisors (37485395520).

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

13391576640 is a wasteful number, since it uses less digits than its factorization.

13391576640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119266 (or 119250 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 13391576640 in words is "thirteen billion, three hundred ninety-one million, five hundred seventy-six thousand, six hundred forty".