13405531944 has 64 divisors (see below), whose sum is σ = 38339596800. Its totient is φ = 3826344384.

The previous prime is 13405531943. The next prime is 13405531949. The reversal of 13405531944 is 44913550431.

It is not an unprimeable number, because it can be changed into a prime (13405531943) 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, 132039 + ... + 210345.

It is an arithmetic number, because the mean of its divisors is an integer number (599056200).

Almost surely, 2^13405531944 is an apocalyptic number.

13405531944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13405531944 is an abundant number, since it is smaller than the sum of its proper divisors (24934064856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13405531944 is a wasteful number, since it uses less digits than its factorization.

13405531944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79342 (or 79338 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 13405531944 in words is "thirteen billion, four hundred five million, five hundred thirty-one thousand, nine hundred forty-four".