642320264 has 32 divisors (see below), whose sum is σ = 1259280000. Its totient is φ = 307150096.

The previous prime is 642320221. The next prime is 642320351. The reversal of 642320264 is 462023246.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94037 + ... + 100635.

It is an arithmetic number, because the mean of its divisors is an integer number (39352500).

Almost surely, 2^642320264 is an apocalyptic number.

It is an amenable number.

642320264 is a deficient number, since it is larger than the sum of its proper divisors (616959736).

642320264 is an equidigital number, since it uses as much as digits as its factorization.

642320264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6674 (or 6624 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 642320264 is about 25344.0380365876. The cubic root of 642320264 is about 862.8140485995.

The spelling of 642320264 in words is "six hundred forty-two million, three hundred twenty thousand, two hundred sixty-four".