2870001561 has 16 divisors (see below), whose sum is σ = 4466386944. Its totient is φ = 1605106704.

The previous prime is 2870001553. The next prime is 2870001581. The reversal of 2870001561 is 1651000782.

It is not a de Polignac number, because 2870001561 - 2³ = 2870001553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2870001521) 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, 1452915 + ... + 1454888.

It is an arithmetic number, because the mean of its divisors is an integer number (279149184).

Almost surely, 2^2870001561 is an apocalyptic number.

2870001561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2870001561 is a deficient number, since it is larger than the sum of its proper divisors (1596385383).

2870001561 is a wasteful number, since it uses less digits than its factorization.

2870001561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907860.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 2870001561 is about 53572.3955129878. The cubic root of 2870001561 is about 1421.1089599817.

The spelling of 2870001561 in words is "two billion, eight hundred seventy million, one thousand, five hundred sixty-one".