1018852561 has 16 divisors (see below), whose sum is σ = 1092420160. Its totient is φ = 947350080.

The previous prime is 1018852553. The next prime is 1018852573. The reversal of 1018852561 is 1652588101.

It is a cyclic number.

It is not a de Polignac number, because 1018852561 - 2³ = 1018852553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1018852561.

It is not an unprimeable number, because it can be changed into a prime (1018852591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 911575 + ... + 912691.

It is an arithmetic number, because the mean of its divisors is an integer number (68276260).

Almost surely, 2^1018852561 is an apocalyptic number.

It is an amenable number.

1018852561 is a deficient number, since it is larger than the sum of its proper divisors (73567599).

1018852561 is a wasteful number, since it uses less digits than its factorization.

1018852561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984.

The product of its (nonzero) digits is 19200, while the sum is 37.

The square root of 1018852561 is about 31919.4699360751. The cubic root of 1018852561 is about 1006.2451044809.

The spelling of 1018852561 in words is "one billion, eighteen million, eight hundred fifty-two thousand, five hundred sixty-one".