3638553875 has 32 divisors (see below), whose sum is σ = 5124600000. Its totient is φ = 2554944000.

The previous prime is 3638553871. The next prime is 3638553907. The reversal of 3638553875 is 5783558363.

It is not a de Polignac number, because 3638553875 - 2² = 3638553871 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3638553871) 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, 5750 + ... + 85499.

It is an arithmetic number, because the mean of its divisors is an integer number (160143750).

Almost surely, 2^3638553875 is an apocalyptic number.

3638553875 is a deficient number, since it is larger than the sum of its proper divisors (1486046125).

3638553875 is a wasteful number, since it uses less digits than its factorization.

3638553875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91304 (or 91294 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 53.

The square root of 3638553875 is about 60320.4266811832. The cubic root of 3638553875 is about 1538.0705970357.

The spelling of 3638553875 in words is "three billion, six hundred thirty-eight million, five hundred fifty-three thousand, eight hundred seventy-five".