13636656240 has 40 divisors (see below), whose sum is σ = 42273635088. Its totient is φ = 3636441600.

The previous prime is 13636656181. The next prime is 13636656259. The reversal of 13636656240 is 4265663631.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 13636656192 and 13636656201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28409461 + ... + 28409940.

Almost surely, 2^13636656240 is an apocalyptic number.

13636656240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13636656240 is an abundant number, since it is smaller than the sum of its proper divisors (28636978848).

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

13636656240 is a wasteful number, since it uses less digits than its factorization.

13636656240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56819417 (or 56819411 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 13636656240 in words is "thirteen billion, six hundred thirty-six million, six hundred fifty-six thousand, two hundred forty".