3621739945 has 8 divisors (see below), whose sum is σ = 4350682944. Its totient is φ = 2894328624.

The previous prime is 3621739921. The next prime is 3621739981. The reversal of 3621739945 is 5499371263.

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

It is a cyclic number.

It is not a de Polignac number, because 3621739945 - 2²⁹ = 3084869033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377709 + ... + 387178.

It is an arithmetic number, because the mean of its divisors is an integer number (543835368).

Almost surely, 2^3621739945 is an apocalyptic number.

It is an amenable number.

3621739945 is a deficient number, since it is larger than the sum of its proper divisors (728942999).

3621739945 is an equidigital number, since it uses as much as digits as its factorization.

3621739945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765839.

The product of its digits is 1224720, while the sum is 49.

The square root of 3621739945 is about 60180.8935211168. The cubic root of 3621739945 is about 1535.6977725737.

The spelling of 3621739945 in words is "three billion, six hundred twenty-one million, seven hundred thirty-nine thousand, nine hundred forty-five".