13399718640 has 320 divisors, whose sum is σ = 52770051072. Its totient is φ = 2731622400.

The previous prime is 13399718639. The next prime is 13399718641. The reversal of 13399718640 is 4681799331.

It is an interprime number because it is at equal distance from previous prime (13399718639) and next prime (13399718641).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13399718641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 972600 + ... + 986280.

Almost surely, 2^13399718640 is an apocalyptic number.

13399718640 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 13399718640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26385025536).

13399718640 is an abundant number, since it is smaller than the sum of its proper divisors (39370332432).

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

13399718640 is a wasteful number, since it uses less digits than its factorization.

13399718640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13768 (or 13762 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 13399718640 in words is "thirteen billion, three hundred ninety-nine million, seven hundred eighteen thousand, six hundred forty".