15995591480 has 128 divisors (see below), whose sum is σ = 41306112000. Its totient is φ = 5520560640.

The previous prime is 15995591473. The next prime is 15995591537. The reversal of 15995591480 is 8419559951.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 742217 + ... + 763463.

It is an arithmetic number, because the mean of its divisors is an integer number (322704000).

Almost surely, 2^15995591480 is an apocalyptic number.

15995591480 is a gapful number since it is divisible by the number (10) 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 15995591480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20653056000).

15995591480 is an abundant number, since it is smaller than the sum of its proper divisors (25310520520).

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

15995591480 is a wasteful number, since it uses less digits than its factorization.

15995591480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21357 (or 21353 counting only the distinct ones).

The product of its (nonzero) digits is 2916000, while the sum is 56.

The spelling of 15995591480 in words is "fifteen billion, nine hundred ninety-five million, five hundred ninety-one thousand, four hundred eighty".