2893661881 has 10 divisors (see below), whose sum is σ = 3183024410. Its totient is φ = 2630588400.

The previous prime is 2893661873. The next prime is 2893661887. The reversal of 2893661881 is 1881663982.

It can be written as a sum of positive squares in only one way, i.e., 2284362025 + 609299856 = 47795^2 + 24684^2 .

It is not a de Polignac number, because 2893661881 - 2³ = 2893661873 is a prime.

It is a super-2 number, since 2×2893661881² = 16746558163104916322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2893661887) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 84180 + ... + 113461.

It is an arithmetic number, because the mean of its divisors is an integer number (318302441).

Almost surely, 2^2893661881 is an apocalyptic number.

It is an amenable number.

2893661881 is a deficient number, since it is larger than the sum of its proper divisors (289362529).

2893661881 is an frugal number, since it uses more digits than its factorization.

2893661881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197685 (or 197652 counting only the distinct ones).

The product of its digits is 995328, while the sum is 52.

The square root of 2893661881 is about 53792.7679246941. The cubic root of 2893661881 is about 1425.0034892292.

The spelling of 2893661881 in words is "two billion, eight hundred ninety-three million, six hundred sixty-one thousand, eight hundred eighty-one".