2015561010 has 16 divisors (see below), whose sum is σ = 4837346496. Its totient is φ = 537482928.

The previous prime is 2015560991. The next prime is 2015561011. The reversal of 2015561010 is 101655102.

It is not an unprimeable number, because it can be changed into a prime (2015561011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33592654 + ... + 33592713.

It is an arithmetic number, because the mean of its divisors is an integer number (302334156).

Almost surely, 2^2015561010 is an apocalyptic number.

2015561010 is an abundant number, since it is smaller than the sum of its proper divisors (2821785486).

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

2015561010 is a wasteful number, since it uses less digits than its factorization.

2015561010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67185377.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 2015561010 is about 44894.9998329435. Note that the first 3 decimals coincide. The cubic root of 2015561010 is about 1263.1802191349.

It can be divided in two parts, 201556 and 1010, that added together give a triangular number (202566 = T₆₃₆).

The spelling of 2015561010 in words is "two billion, fifteen million, five hundred sixty-one thousand, ten".