2871557761 has 4 divisors (see below), whose sum is σ = 3022692400. Its totient is φ = 2720423124.

The previous prime is 2871557747. The next prime is 2871557809. The reversal of 2871557761 is 1677551782.

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 a cyclic number.

It is not a de Polignac number, because 2871557761 - 2⁵ = 2871557729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2871557461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75567291 + ... + 75567328.

It is an arithmetic number, because the mean of its divisors is an integer number (755673100).

Almost surely, 2^2871557761 is an apocalyptic number.

It is an amenable number.

2871557761 is a deficient number, since it is larger than the sum of its proper divisors (151134639).

2871557761 is a wasteful number, since it uses less digits than its factorization.

2871557761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151134638.

The product of its digits is 823200, while the sum is 49.

The square root of 2871557761 is about 53586.9178158252. The cubic root of 2871557761 is about 1421.3657693850.

The spelling of 2871557761 in words is "two billion, eight hundred seventy-one million, five hundred fifty-seven thousand, seven hundred sixty-one".