13845581091 has 12 divisors (see below), whose sum is σ = 20001543432. Its totient is φ = 9229293216.

The previous prime is 13845581081. The next prime is 13845581107. The reversal of 13845581091 is 19018554831.

13845581091 is a `hidden beast` number, since 1 + 3 + 8 + 4 + 558 + 1 + 0 + 91 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-13845581091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13845581081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6946 + ... + 166551.

It is an arithmetic number, because the mean of its divisors is an integer number (1666795286).

Almost surely, 2^13845581091 is an apocalyptic number.

13845581091 is a deficient number, since it is larger than the sum of its proper divisors (6155962341).

13845581091 is a wasteful number, since it uses less digits than its factorization.

13845581091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182370 (or 182367 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 45.

The spelling of 13845581091 in words is "thirteen billion, eight hundred forty-five million, five hundred eighty-one thousand, ninety-one".