3645856155 has 32 divisors (see below), whose sum is σ = 6170420736. Its totient is φ = 1834424064.

The previous prime is 3645856141. The next prime is 3645856157. The reversal of 3645856155 is 5516585463.

It is a happy number.

It is not a de Polignac number, because 3645856155 - 2¹³ = 3645847963 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (3645856157) 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 31 ways as a sum of consecutive naturals, for example, 47197 + ... + 97566.

It is an arithmetic number, because the mean of its divisors is an integer number (192825648).

Almost surely, 2^3645856155 is an apocalyptic number.

3645856155 is a deficient number, since it is larger than the sum of its proper divisors (2524564581).

3645856155 is a wasteful number, since it uses less digits than its factorization.

3645856155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144867.

The product of its digits is 2160000, while the sum is 48.

The square root of 3645856155 is about 60380.9254235143. The cubic root of 3645856155 is about 1539.0988367701.

The spelling of 3645856155 in words is "three billion, six hundred forty-five million, eight hundred fifty-six thousand, one hundred fifty-five".