3817981653 has 16 divisors (see below), whose sum is σ = 5212517376. Its totient is φ = 2484462960.

The previous prime is 3817981637. The next prime is 3817981679. The reversal of 3817981653 is 3561897183.

It is not a de Polignac number, because 3817981653 - 2⁴ = 3817981637 is a prime.

It is a super-2 number, since 2×3817981653² = 29153967805289224818, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3817981596 and 3817981605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3817981613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200788 + ... + 218978.

It is an arithmetic number, because the mean of its divisors is an integer number (325782336).

Almost surely, 2^3817981653 is an apocalyptic number.

It is an amenable number.

3817981653 is a deficient number, since it is larger than the sum of its proper divisors (1394535723).

3817981653 is a wasteful number, since it uses less digits than its factorization.

3817981653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19864.

The product of its digits is 1088640, while the sum is 51.

The square root of 3817981653 is about 61789.8183603092. The cubic root of 3817981653 is about 1562.9482997215.

The spelling of 3817981653 in words is "three billion, eight hundred seventeen million, nine hundred eighty-one thousand, six hundred fifty-three".