2861889031889 has 16 divisors (see below), whose sum is σ = 2878038190080. Its totient is φ = 2845788086400.

The previous prime is 2861889031879. The next prime is 2861889031901. The reversal of 2861889031889 is 9881309881682.

It is not a de Polignac number, because 2861889031889 - 2²⁰ = 2861887983313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2861889031879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303837422 + ... + 303846840.

It is an arithmetic number, because the mean of its divisors is an integer number (179877386880).

Almost surely, 2^{2861889031889} is an apocalyptic number.

It is an amenable number.

2861889031889 is a deficient number, since it is larger than the sum of its proper divisors (16149158191).

2861889031889 is a wasteful number, since it uses less digits than its factorization.

2861889031889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11800.

The product of its (nonzero) digits is 95551488, while the sum is 71.

The spelling of 2861889031889 in words is "two trillion, eight hundred sixty-one billion, eight hundred eighty-nine million, thirty-one thousand, eight hundred eighty-nine".