13881105785 has 8 divisors (see below), whose sum is σ = 17534028480. Its totient is φ = 10520416944.

The previous prime is 13881105781. The next prime is 13881105839. The reversal of 13881105785 is 58750118831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13881105785 - 2² = 13881105781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13881105781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73058357 + ... + 73058546.

It is an arithmetic number, because the mean of its divisors is an integer number (2191753560).

Almost surely, 2^13881105785 is an apocalyptic number.

It is an amenable number.

13881105785 is a deficient number, since it is larger than the sum of its proper divisors (3652922695).

13881105785 is a wasteful number, since it uses less digits than its factorization.

13881105785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146116927.

The product of its (nonzero) digits is 268800, while the sum is 47.

The spelling of 13881105785 in words is "thirteen billion, eight hundred eighty-one million, one hundred five thousand, seven hundred eighty-five".