645376296 has 32 divisors (see below), whose sum is σ = 1616783040. Its totient is φ = 214679808.

The previous prime is 645376271. The next prime is 645376307. The reversal of 645376296 is 692673546.

645376296 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15921 + ... + 39296.

It is an arithmetic number, because the mean of its divisors is an integer number (50524470).

Almost surely, 2^645376296 is an apocalyptic number.

It is an amenable number.

645376296 is an abundant number, since it is smaller than the sum of its proper divisors (971406744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645376296 is a wasteful number, since it uses less digits than its factorization.

645376296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55713 (or 55709 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 48.

The square root of 645376296 is about 25404.2574384689. The cubic root of 645376296 is about 864.1802500303.

The spelling of 645376296 in words is "six hundred forty-five million, three hundred seventy-six thousand, two hundred ninety-six".