642481562 has 32 divisors (see below), whose sum is σ = 1017273600. Its totient is φ = 304193760.

The previous prime is 642481531. The next prime is 642481589. The reversal of 642481562 is 265184246.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8132639 + ... + 8132717.

It is an arithmetic number, because the mean of its divisors is an integer number (31789800).

Almost surely, 2^642481562 is an apocalyptic number.

642481562 is a deficient number, since it is larger than the sum of its proper divisors (374792038).

642481562 is an frugal number, since it uses more digits than its factorization.

642481562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 181 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 642481562 is about 25347.2200053576. The cubic root of 642481562 is about 862.8862651870.

The spelling of 642481562 in words is "six hundred forty-two million, four hundred eighty-one thousand, five hundred sixty-two".