13881582861 has 8 divisors (see below), whose sum is σ = 18582518304. Its totient is φ = 9217518000.

The previous prime is 13881582857. The next prime is 13881582959. The reversal of 13881582861 is 16828518831.

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

It is not a de Polignac number, because 13881582861 - 2² = 13881582857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13881582061) 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, 9216766 + ... + 9218271.

It is an arithmetic number, because the mean of its divisors is an integer number (2322814788).

Almost surely, 2^13881582861 is an apocalyptic number.

It is an amenable number.

13881582861 is a deficient number, since it is larger than the sum of its proper divisors (4700935443).

13881582861 is a wasteful number, since it uses less digits than its factorization.

13881582861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18435291.

The product of its digits is 737280, while the sum is 51.

The spelling of 13881582861 in words is "thirteen billion, eight hundred eighty-one million, five hundred eighty-two thousand, eight hundred sixty-one".