3808375645 has 4 divisors (see below), whose sum is σ = 4570050780. Its totient is φ = 3046700512.

The previous prime is 3808375639. The next prime is 3808375667. The reversal of 3808375645 is 5465738083.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1221432601 + 2586943044 = 34949^2 + 50862^2 .

It is a cyclic number.

It is not a de Polignac number, because 3808375645 - 2¹⁹ = 3807851357 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380837560 + ... + 380837569.

It is an arithmetic number, because the mean of its divisors is an integer number (1142512695).

Almost surely, 2^3808375645 is an apocalyptic number.

It is an amenable number.

3808375645 is a deficient number, since it is larger than the sum of its proper divisors (761675135).

3808375645 is an equidigital number, since it uses as much as digits as its factorization.

3808375645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761675134.

The product of its (nonzero) digits is 2419200, while the sum is 49.

The square root of 3808375645 is about 61712.0380882045. The cubic root of 3808375645 is about 1561.6364108488.

The spelling of 3808375645 in words is "three billion, eight hundred eight million, three hundred seventy-five thousand, six hundred forty-five".