2695863681 has 32 divisors (see below), whose sum is σ = 4628736000. Its totient is φ = 1518788880.

The previous prime is 2695863641. The next prime is 2695863691. The reversal of 2695863681 is 1863685962.

It is a happy number.

2695863681 is a `hidden beast` number, since 26 + 9 + 586 + 36 + 8 + 1 = 666.

It is not a de Polignac number, because 2695863681 - 2⁶ = 2695863617 is a prime.

It is a super-2 number, since 2×2695863681² = 14535361973069739522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2695863631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87031 + ... + 113868.

It is an arithmetic number, because the mean of its divisors is an integer number (144648000).

Almost surely, 2^2695863681 is an apocalyptic number.

2695863681 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2695863681 is a deficient number, since it is larger than the sum of its proper divisors (1932872319).

2695863681 is a wasteful number, since it uses less digits than its factorization.

2695863681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200986 (or 200980 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 2695863681 is about 51921.7072234725. The cubic root of 2695863681 is about 1391.7652091735.

The spelling of 2695863681 in words is "two billion, six hundred ninety-five million, eight hundred sixty-three thousand, six hundred eighty-one".