13436730640 has 80 divisors (see below), whose sum is σ = 34516326528. Its totient is φ = 4838586368.

The previous prime is 13436730611. The next prime is 13436730641. The reversal of 13436730640 is 4603763431.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 13436730640.

It is not an unprimeable number, because it can be changed into a prime (13436730641) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 183502 + ... + 246061.

Almost surely, 2^13436730640 is an apocalyptic number.

13436730640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13436730640 is an abundant number, since it is smaller than the sum of its proper divisors (21079595888).

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

13436730640 is a wasteful number, since it uses less digits than its factorization.

13436730640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429616 (or 429610 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 37.

The spelling of 13436730640 in words is "thirteen billion, four hundred thirty-six million, seven hundred thirty thousand, six hundred forty".