645762327 has 32 divisors (see below), whose sum is σ = 1016332800. Its totient is φ = 364512960.

The previous prime is 645762319. The next prime is 645762349. The reversal of 645762327 is 723267546.

It is not a de Polignac number, because 645762327 - 2³ = 645762319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645762317) 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 31 ways as a sum of consecutive naturals, for example, 81627 + ... + 89187.

It is an arithmetic number, because the mean of its divisors is an integer number (31760400).

Almost surely, 2^645762327 is an apocalyptic number.

645762327 is a deficient number, since it is larger than the sum of its proper divisors (370570473).

645762327 is an equidigital number, since it uses as much as digits as its factorization.

645762327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7668 (or 7654 counting only the distinct ones).

The product of its digits is 423360, while the sum is 42.

The square root of 645762327 is about 25411.8540645896. The cubic root of 645762327 is about 864.3525184552.

The spelling of 645762327 in words is "six hundred forty-five million, seven hundred sixty-two thousand, three hundred twenty-seven".