2015740609 has 27 divisors (see below), whose sum is σ = 2276294787. Its totient is φ = 1784386368.

The previous prime is 2015740561. The next prime is 2015740637. The reversal of 2015740609 is 9060475102.

The square root of 2015740609 is 44897.

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., 1569348225 + 446392384 = 39615^2 + 21128^2 .

It is not a de Polignac number, because 2015740609 - 2²⁵ = 1982186177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2015740109) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 14501662 + ... + 14501800.

Almost surely, 2^2015740609 is an apocalyptic number.

2015740609 is the 44897-th square number.

2015740609 is the 22449-th centered octagonal number.

It is an amenable number.

2015740609 is a deficient number, since it is larger than the sum of its proper divisors (260554178).

2015740609 is an equidigital number, since it uses as much as digits as its factorization.

2015740609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 34.

The cubic root of 2015740609 is about 1263.2177370873.

The spelling of 2015740609 in words is "two billion, fifteen million, seven hundred forty thousand, six hundred nine".