3681987975 has 48 divisors (see below), whose sum is σ = 6801543840. Its totient is φ = 1952812800.

The previous prime is 3681987949. The next prime is 3681987977. The reversal of 3681987975 is 5797891863.

It is not a de Polignac number, because 3681987975 - 2⁷ = 3681987847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681987977) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107107 + ... + 137243.

It is an arithmetic number, because the mean of its divisors is an integer number (141698830).

Almost surely, 2^3681987975 is an apocalyptic number.

3681987975 is a deficient number, since it is larger than the sum of its proper divisors (3119555865).

3681987975 is a wasteful number, since it uses less digits than its factorization.

3681987975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30337 (or 30326 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 63.

The square root of 3681987975 is about 60679.3867388259. The cubic root of 3681987975 is about 1544.1664841408.

The spelling of 3681987975 in words is "three billion, six hundred eighty-one million, nine hundred eighty-seven thousand, nine hundred seventy-five".