3644420355 has 12 divisors (see below), whose sum is σ = 6316995360. Its totient is φ = 1943690832.

The previous prime is 3644420347. The next prime is 3644420359. The reversal of 3644420355 is 5530244463.

3644420355 is a `hidden beast` number, since 3 + 6 + 444 + 203 + 5 + 5 = 666.

It is not a de Polignac number, because 3644420355 - 2³ = 3644420347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3644420359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40493515 + ... + 40493604.

It is an arithmetic number, because the mean of its divisors is an integer number (526416280).

Almost surely, 2^3644420355 is an apocalyptic number.

3644420355 is a deficient number, since it is larger than the sum of its proper divisors (2672575005).

3644420355 is a wasteful number, since it uses less digits than its factorization.

3644420355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80987130 (or 80987127 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

The square root of 3644420355 is about 60369.0347363613. The cubic root of 3644420355 is about 1538.8967691652.

The spelling of 3644420355 in words is "three billion, six hundred forty-four million, four hundred twenty thousand, three hundred fifty-five".