15461532816 has 80 divisors (see below), whose sum is σ = 41469816000. Its totient is φ = 4958037504.

The previous prime is 15461532809. The next prime is 15461532839. The reversal of 15461532816 is 61823516451.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 365535 + ... + 405633.

It is an arithmetic number, because the mean of its divisors is an integer number (518372700).

Almost surely, 2^15461532816 is an apocalyptic number.

15461532816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15461532816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20734908000).

15461532816 is an abundant number, since it is smaller than the sum of its proper divisors (26008283184).

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

15461532816 is a wasteful number, since it uses less digits than its factorization.

15461532816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40416 (or 40410 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The spelling of 15461532816 in words is "fifteen billion, four hundred sixty-one million, five hundred thirty-two thousand, eight hundred sixteen".