3251646563 has 4 divisors (see below), whose sum is σ = 3547250808. Its totient is φ = 2956042320.

The previous prime is 3251646493. The next prime is 3251646581. The reversal of 3251646563 is 3656461523.

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

It is not a de Polignac number, because 3251646563 - 2²⁴ = 3234869347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3251646563.

It is not an unprimeable number, because it can be changed into a prime (3251606563) 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, 147802106 + ... + 147802127.

It is an arithmetic number, because the mean of its divisors is an integer number (886812702).

Almost surely, 2^3251646563 is an apocalyptic number.

3251646563 is a deficient number, since it is larger than the sum of its proper divisors (295604245).

3251646563 is a wasteful number, since it uses less digits than its factorization.

3251646563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295604244.

The product of its digits is 388800, while the sum is 41.

The square root of 3251646563 is about 57023.2107391367. The cubic root of 3251646563 is about 1481.4981425559.

The spelling of 3251646563 in words is "three billion, two hundred fifty-one million, six hundred forty-six thousand, five hundred sixty-three".