13440726678 has 32 divisors (see below), whose sum is σ = 27404044416. Its totient is φ = 4393932608.

The previous prime is 13440726661. The next prime is 13440726697. The reversal of 13440726678 is 87662704431.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30276 + ... + 166727.

It is an arithmetic number, because the mean of its divisors is an integer number (856376388).

Almost surely, 2^13440726678 is an apocalyptic number.

13440726678 is an abundant number, since it is smaller than the sum of its proper divisors (13963317738).

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

13440726678 is a wasteful number, since it uses less digits than its factorization.

13440726678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197228.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 13440726678 in words is "thirteen billion, four hundred forty million, seven hundred twenty-six thousand, six hundred seventy-eight".