642463364 has 12 divisors (see below), whose sum is σ = 1139712924. Its totient is φ = 316831104.

The previous prime is 642463333. The next prime is 642463369. The reversal of 642463364 is 463364246.

It can be written as a sum of positive squares in 2 ways, for example, as 122988100 + 519475264 = 11090^2 + 22792^2 .

It is not an unprimeable number, because it can be changed into a prime (642463369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099817 + ... + 1100400.

It is an arithmetic number, because the mean of its divisors is an integer number (94976077).

Almost surely, 2^642463364 is an apocalyptic number.

It is an amenable number.

642463364 is a deficient number, since it is larger than the sum of its proper divisors (497249560).

642463364 is a wasteful number, since it uses less digits than its factorization.

642463364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2200294 (or 2200292 counting only the distinct ones).

The product of its digits is 248832, while the sum is 38.

The square root of 642463364 is about 25346.8610285376. The cubic root of 642463364 is about 862.8781181555.

The spelling of 642463364 in words is "six hundred forty-two million, four hundred sixty-three thousand, three hundred sixty-four".