13045840665 has 96 divisors (see below), whose sum is σ = 24802555008. Its totient is φ = 5816448000.

The previous prime is 13045840657. The next prime is 13045840697. The reversal of 13045840665 is 56604854031.

It is not a de Polignac number, because 13045840665 - 2³ = 13045840657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7242765 + ... + 7244565.

It is an arithmetic number, because the mean of its divisors is an integer number (258359948).

Almost surely, 2^13045840665 is an apocalyptic number.

13045840665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13045840665 is a deficient number, since it is larger than the sum of its proper divisors (11756714343).

13045840665 is a wasteful number, since it uses less digits than its factorization.

13045840665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151 (or 2140 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 13045840665 in words is "thirteen billion, forty-five million, eight hundred forty thousand, six hundred sixty-five".