2015561264 has 10 divisors (see below), whose sum is σ = 3905149980. Its totient is φ = 1007780624.

The previous prime is 2015561257. The next prime is 2015561267. The reversal of 2015561264 is 4621655102.

It is a self number, because there is not a number n which added to its sum of digits gives 2015561264.

It is not an unprimeable number, because it can be changed into a prime (2015561267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62986274 + ... + 62986305.

It is an arithmetic number, because the mean of its divisors is an integer number (390514998).

Almost surely, 2^2015561264 is an apocalyptic number.

It is an amenable number.

2015561264 is a deficient number, since it is larger than the sum of its proper divisors (1889588716).

2015561264 is a wasteful number, since it uses less digits than its factorization.

2015561264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125972587 (or 125972581 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 2015561264 is about 44895.0026617663. The cubic root of 2015561264 is about 1263.1802721966.

The spelling of 2015561264 in words is "two billion, fifteen million, five hundred sixty-one thousand, two hundred sixty-four".