642558484 has 12 divisors (see below), whose sum is σ = 1125036864. Its totient is φ = 321119384.

The previous prime is 642558467. The next prime is 642558493. The reversal of 642558484 is 484855246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30682 + ... + 47185.

It is an arithmetic number, because the mean of its divisors is an integer number (93753072).

Almost surely, 2^642558484 is an apocalyptic number.

It is an amenable number.

642558484 is a deficient number, since it is larger than the sum of its proper divisors (482478380).

642558484 is a wasteful number, since it uses less digits than its factorization.

642558484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79934 (or 79932 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 46.

The square root of 642558484 is about 25348.7373255553. The cubic root of 642558484 is about 862.9207005661.

The spelling of 642558484 in words is "six hundred forty-two million, five hundred fifty-eight thousand, four hundred eighty-four".