2861555671 has 8 divisors (see below), whose sum is σ = 3125080224. Its totient is φ = 2604231840.

The previous prime is 2861555659. The next prime is 2861555693. The reversal of 2861555671 is 1765551682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2861555671 - 2⁵ = 2861555639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2861555071) 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, 1549216 + ... + 1551061.

It is an arithmetic number, because the mean of its divisors is an integer number (390635028).

Almost surely, 2^2861555671 is an apocalyptic number.

2861555671 is a deficient number, since it is larger than the sum of its proper divisors (263524553).

2861555671 is a wasteful number, since it uses less digits than its factorization.

2861555671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100361.

The product of its digits is 504000, while the sum is 46.

The square root of 2861555671 is about 53493.5105503462. The cubic root of 2861555671 is about 1419.7135689879.

The spelling of 2861555671 in words is "two billion, eight hundred sixty-one million, five hundred fifty-five thousand, six hundred seventy-one".