645347416 has 16 divisors (see below), whose sum is σ = 1382887440. Its totient is φ = 276577440.

The previous prime is 645347413. The next prime is 645347431. The reversal of 645347416 is 614743546.

645347416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645347413) 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, 5761975 + ... + 5762086.

It is an arithmetic number, because the mean of its divisors is an integer number (86430465).

Almost surely, 2^645347416 is an apocalyptic number.

It is an amenable number.

645347416 is an abundant number, since it is smaller than the sum of its proper divisors (737540024).

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

645347416 is a wasteful number, since it uses less digits than its factorization.

645347416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11524074 (or 11524070 counting only the distinct ones).

The product of its digits is 241920, while the sum is 40.

The square root of 645347416 is about 25403.6890234470. The cubic root of 645347416 is about 864.1673594123.

The spelling of 645347416 in words is "six hundred forty-five million, three hundred forty-seven thousand, four hundred sixteen".