15944414872 has 32 divisors (see below), whose sum is σ = 30321345600. Its totient is φ = 7859138464.

The previous prime is 15944414831. The next prime is 15944414873. The reversal of 15944414872 is 27841444951.

It is a super-2 number, since 2×15944414872² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15944414873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284379 + ... + 335797.

It is an arithmetic number, because the mean of its divisors is an integer number (947542050).

Almost surely, 2^15944414872 is an apocalyptic number.

It is an amenable number.

15944414872 is a deficient number, since it is larger than the sum of its proper divisors (14376930728).

15944414872 is a wasteful number, since it uses less digits than its factorization.

15944414872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51975 (or 51971 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 49.

The spelling of 15944414872 in words is "fifteen billion, nine hundred forty-four million, four hundred fourteen thousand, eight hundred seventy-two".