3616695981 has 16 divisors (see below), whose sum is σ = 5359080000. Its totient is φ = 2410675344.

The previous prime is 3616695949. The next prime is 3616695983. The reversal of 3616695981 is 1895966163.

3616695981 is a `hidden beast` number, since 36 + 16 + 6 + 9 + 598 + 1 = 666.

It is not a de Polignac number, because 3616695981 - 2⁵ = 3616695949 is a prime.

It is a super-2 number, since 2×3616695981² = 26160979637963104722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (54) 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 (3616695983) 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, 194895 + ... + 212643.

It is an arithmetic number, because the mean of its divisors is an integer number (334942500).

Almost surely, 2^3616695981 is an apocalyptic number.

It is an amenable number.

3616695981 is a deficient number, since it is larger than the sum of its proper divisors (1742384019).

3616695981 is a wasteful number, since it uses less digits than its factorization.

3616695981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25305 (or 25299 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 3616695981 is about 60138.9722309918. The cubic root of 3616695981 is about 1534.9845239592.

The spelling of 3616695981 in words is "three billion, six hundred sixteen million, six hundred ninety-five thousand, nine hundred eighty-one".