642742438548 has 24 divisors (see below), whose sum is σ = 1713979836352. Its totient is φ = 183640696704.

The previous prime is 642742438523. The next prime is 642742438577. The reversal of 642742438548 is 845834247246.

It is a happy number.

642742438548 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3825847765 + ... + 3825847932.

Almost surely, 2^642742438548 is an apocalyptic number.

It is an amenable number.

642742438548 is an abundant number, since it is smaller than the sum of its proper divisors (1071237397804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642742438548 is a wasteful number, since it uses less digits than its factorization.

642742438548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7651695711 (or 7651695709 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 57.

The spelling of 642742438548 in words is "six hundred forty-two billion, seven hundred forty-two million, four hundred thirty-eight thousand, five hundred forty-eight".