2095861781 has 24 divisors (see below), whose sum is σ = 2338880544. Its totient is φ = 1875856320.

The previous prime is 2095861777. The next prime is 2095861783. The reversal of 2095861781 is 1871685902.

It is not a de Polignac number, because 2095861781 - 2² = 2095861777 is a prime.

It is a super-2 number, since 2×2095861781² = 8785273210112983922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2095861783) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3570170 + ... + 3570756.

It is an arithmetic number, because the mean of its divisors is an integer number (97453356).

Almost surely, 2^2095861781 is an apocalyptic number.

It is an amenable number.

2095861781 is a deficient number, since it is larger than the sum of its proper divisors (243018763).

2095861781 is a wasteful number, since it uses less digits than its factorization.

2095861781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 1208 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 2095861781 is about 45780.5830128888. The cubic root of 2095861781 is about 1279.7374504228.

The spelling of 2095861781 in words is "two billion, ninety-five million, eight hundred sixty-one thousand, seven hundred eighty-one".