2870055561 has 4 divisors (see below), whose sum is σ = 3826740752. Its totient is φ = 1913370372.

The previous prime is 2870055533. The next prime is 2870055569. The reversal of 2870055561 is 1655500782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2870055561 - 2²⁶ = 2802946697 is a prime.

It is a super-3 number, since 3×2870055561³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2870055569) 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 3 ways as a sum of consecutive naturals, for example, 478342591 + ... + 478342596.

It is an arithmetic number, because the mean of its divisors is an integer number (956685188).

Almost surely, 2^2870055561 is an apocalyptic number.

It is an amenable number.

2870055561 is a deficient number, since it is larger than the sum of its proper divisors (956685191).

2870055561 is an equidigital number, since it uses as much as digits as its factorization.

2870055561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956685190.

The product of its (nonzero) digits is 84000, while the sum is 39.

The square root of 2870055561 is about 53572.8995015204. The cubic root of 2870055561 is about 1421.1178727994.

The spelling of 2870055561 in words is "two billion, eight hundred seventy million, fifty-five thousand, five hundred sixty-one".