15961536 has 70 divisors (see below), whose sum is σ = 47330360. Its totient is φ = 5318784.

The previous prime is 15961507. The next prime is 15961549. The reversal of 15961536 is 63516951.

15961536 is a `hidden beast` number, since 1 + 5 + 9 + 615 + 36 = 666.

15961536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 15961536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3645 + ... + 6723.

It is an arithmetic number, because the mean of its divisors is an integer number (676148).

Almost surely, 2^15961536 is an apocalyptic number.

15961536 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 15961536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23665180).

15961536 is an abundant number, since it is smaller than the sum of its proper divisors (31368824).

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

15961536 is an equidigital number, since it uses as much as digits as its factorization.

15961536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3103 (or 3084 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 15961536 is about 3995.1891069135. The cubic root of 15961536 is about 251.7821246077.

The spelling of 15961536 in words is "fifteen million, nine hundred sixty-one thousand, five hundred thirty-six".