15844401696 has 24 divisors (see below), whose sum is σ = 41591554704. Its totient is φ = 5281467200.

The previous prime is 15844401649. The next prime is 15844401697. The reversal of 15844401696 is 69610444851.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (15844401697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82522830 + ... + 82523021.

It is an arithmetic number, because the mean of its divisors is an integer number (1732981446).

Almost surely, 2^15844401696 is an apocalyptic number.

15844401696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15844401696 is an abundant number, since it is smaller than the sum of its proper divisors (25747153008).

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

15844401696 is a wasteful number, since it uses less digits than its factorization.

15844401696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165045864 (or 165045856 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 15844401696 in words is "fifteen billion, eight hundred forty-four million, four hundred one thousand, six hundred ninety-six".