3638806971 has 8 divisors (see below), whose sum is σ = 4869009744. Its totient is φ = 2417237760.

The previous prime is 3638806967. The next prime is 3638806979. The reversal of 3638806971 is 1796088363.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3638806971 - 2² = 3638806967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3638806979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2157406 + ... + 2159091.

It is an arithmetic number, because the mean of its divisors is an integer number (608626218).

Almost surely, 2^3638806971 is an apocalyptic number.

3638806971 is a deficient number, since it is larger than the sum of its proper divisors (1230202773).

3638806971 is a wasteful number, since it uses less digits than its factorization.

3638806971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316781.

The product of its (nonzero) digits is 1306368, while the sum is 51.

The square root of 3638806971 is about 60322.5245741589. The cubic root of 3638806971 is about 1538.1062586844.

The spelling of 3638806971 in words is "three billion, six hundred thirty-eight million, eight hundred six thousand, nine hundred seventy-one".