3645845979 has 4 divisors (see below), whose sum is σ = 4861127976. Its totient is φ = 2430563984.

The previous prime is 3645845963. The next prime is 3645845981. The reversal of 3645845979 is 9795485463.

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

It is a cyclic number.

It is not a de Polignac number, because 3645845979 - 2⁴ = 3645845963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3645845909) 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 3 ways as a sum of consecutive naturals, for example, 607640994 + ... + 607640999.

It is an arithmetic number, because the mean of its divisors is an integer number (1215281994).

Almost surely, 2^3645845979 is an apocalyptic number.

3645845979 is a deficient number, since it is larger than the sum of its proper divisors (1215281997).

3645845979 is a wasteful number, since it uses less digits than its factorization.

3645845979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215281996.

The product of its digits is 32659200, while the sum is 60.

The square root of 3645845979 is about 60380.8411584337. The cubic root of 3645845979 is about 1539.0974048354.

The spelling of 3645845979 in words is "three billion, six hundred forty-five million, eight hundred forty-five thousand, nine hundred seventy-nine".