3231278649 has 28 divisors (see below), whose sum is σ = 4850244336. Its totient is φ = 2151722232.

The previous prime is 3231278627. The next prime is 3231278663. The reversal of 3231278649 is 9468721323.

It is not a de Polignac number, because 3231278649 - 2⁹ = 3231278137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3231278669) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 816694 + ... + 820640.

It is an arithmetic number, because the mean of its divisors is an integer number (173223012).

Almost surely, 2^3231278649 is an apocalyptic number.

It is an amenable number.

3231278649 is a deficient number, since it is larger than the sum of its proper divisors (1618965687).

3231278649 is an equidigital number, since it uses as much as digits as its factorization.

3231278649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088 (or 5073 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 3231278649 is about 56844.3370002677. The cubic root of 3231278649 is about 1478.3983539246.

It can be divided in two parts, 323127 and 8649, that added together give a 4-th power (331776 = 24⁴).

The spelling of 3231278649 in words is "three billion, two hundred thirty-one million, two hundred seventy-eight thousand, six hundred forty-nine".