15215905056 has 96 divisors (see below), whose sum is σ = 43623014400. Its totient is φ = 4605569280.

The previous prime is 15215905039. The next prime is 15215905073. The reversal of 15215905056 is 65050951251.

It is an interprime number because it is at equal distance from previous prime (15215905039) and next prime (15215905073).

It is a tau number, because it is divible by the number of its divisors (96).

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, 962625 + ... + 978303.

It is an arithmetic number, because the mean of its divisors is an integer number (454406400).

Almost surely, 2^15215905056 is an apocalyptic number.

15215905056 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 15215905056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21811507200).

15215905056 is an abundant number, since it is smaller than the sum of its proper divisors (28407109344).

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

15215905056 is a wasteful number, since it uses less digits than its factorization.

15215905056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16622 (or 16614 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 39.

The spelling of 15215905056 in words is "fifteen billion, two hundred fifteen million, nine hundred five thousand, fifty-six".