15444166040 has 32 divisors (see below), whose sum is σ = 36260218080. Its totient is φ = 5909071872.

The previous prime is 15444166039. The next prime is 15444166051. The reversal of 15444166040 is 4066144451.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8392649 + ... + 8394488.

It is an arithmetic number, because the mean of its divisors is an integer number (1133131815).

Almost surely, 2^15444166040 is an apocalyptic number.

15444166040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15444166040 is an abundant number, since it is smaller than the sum of its proper divisors (20816052040).

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

15444166040 is a wasteful number, since it uses less digits than its factorization.

15444166040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16787171 (or 16787167 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 15444166040 in words is "fifteen billion, four hundred forty-four million, one hundred sixty-six thousand, forty".