645347415 has 8 divisors (see below), whose sum is σ = 1032555888. Its totient is φ = 344185280.

The previous prime is 645347413. The next prime is 645347431. The reversal of 645347415 is 514743546.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 645347415 - 2¹ = 645347413 is a prime.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21511566 + ... + 21511595.

It is an arithmetic number, because the mean of its divisors is an integer number (129069486).

Almost surely, 2^645347415 is an apocalyptic number.

645347415 is a deficient number, since it is larger than the sum of its proper divisors (387208473).

645347415 is a wasteful number, since it uses less digits than its factorization.

645347415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43023169.

The product of its digits is 201600, while the sum is 39.

The square root of 645347415 is about 25403.6890037648. The cubic root of 645347415 is about 864.1673589659.

The spelling of 645347415 in words is "six hundred forty-five million, three hundred forty-seven thousand, four hundred fifteen".