3645156563 has 4 divisors (see below), whose sum is σ = 3647505288. Its totient is φ = 3642807840.

The previous prime is 3645156551. The next prime is 3645156583. The reversal of 3645156563 is 3656515463.

3645156563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3656515463 = 449 ⋅8143687.

It is a cyclic number.

It is not a de Polignac number, because 3645156563 - 2¹⁴ = 3645140179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3645156503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172033 + ... + 1175138.

It is an arithmetic number, because the mean of its divisors is an integer number (911876322).

Almost surely, 2^3645156563 is an apocalyptic number.

3645156563 is a deficient number, since it is larger than the sum of its proper divisors (2348725).

3645156563 is a wasteful number, since it uses less digits than its factorization.

3645156563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348724.

The product of its digits is 972000, while the sum is 44.

The square root of 3645156563 is about 60375.1319915741. The cubic root of 3645156563 is about 1539.0003861762. Note that the first 3 decimals are identical.

The spelling of 3645156563 in words is "three billion, six hundred forty-five million, one hundred fifty-six thousand, five hundred sixty-three".