2015650816 has 99 divisors (see below), whose sum is σ = 4282321953. Its totient is φ = 948203520.

The previous prime is 2015650787. The next prime is 2015650817. The reversal of 2015650816 is 6180565102.

It is a happy number.

The square root of 2015650816 is 44896.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 65545216 + 1950105600 = 8096^2 + 44160^2 .

It is not an unprimeable number, because it can be changed into a prime (2015650817) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 33043426 + ... + 33043486.

Almost surely, 2^2015650816 is an apocalyptic number.

2015650816 is the 44896-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2015650816

2015650816 is an abundant number, since it is smaller than the sum of its proper divisors (2266671137).

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

2015650816 is an frugal number, since it uses more digits than its factorization.

2015650816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The cubic root of 2015650816 is about 1263.1989797475.

Multiplying 2015650816 by its product of nonzero digits (14400), we get a square (29025371750400 = 5387520²).

The spelling of 2015650816 in words is "two billion, fifteen million, six hundred fifty thousand, eight hundred sixteen".