13661799441 has 16 divisors (see below), whose sum is σ = 18407262720. Its totient is φ = 9012211200.

The previous prime is 13661799427. The next prime is 13661799469. The reversal of 13661799441 is 14499716631.

It is not a de Polignac number, because 13661799441 - 2⁹ = 13661798929 is a prime.

It is a super-2 number, since 2×13661799441² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13661794441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520161 + ... + 545793.

It is an arithmetic number, because the mean of its divisors is an integer number (1150453920).

Almost surely, 2^13661799441 is an apocalyptic number.

It is an amenable number.

13661799441 is a deficient number, since it is larger than the sum of its proper divisors (4745463279).

13661799441 is a wasteful number, since it uses less digits than its factorization.

13661799441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27496.

The product of its digits is 979776, while the sum is 51.

The spelling of 13661799441 in words is "thirteen billion, six hundred sixty-one million, seven hundred ninety-nine thousand, four hundred forty-one".