13965445644 has 24 divisors (see below), whose sum is σ = 32659609920. Its totient is φ = 4644638544.

The previous prime is 13965445621. The next prime is 13965445661. The reversal of 13965445644 is 44654456931.

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, 1308214 + ... + 1318845.

It is an arithmetic number, because the mean of its divisors is an integer number (1360817080).

Almost surely, 2^13965445644 is an apocalyptic number.

It is an amenable number.

13965445644 is an abundant number, since it is smaller than the sum of its proper divisors (18694164276).

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

13965445644 is a wasteful number, since it uses less digits than its factorization.

13965445644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2627509 (or 2627507 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 51.

The spelling of 13965445644 in words is "thirteen billion, nine hundred sixty-five million, four hundred forty-five thousand, six hundred forty-four".