642204453426 has 16 divisors (see below), whose sum is σ = 1284593558400. Its totient is φ = 214037375888.

The previous prime is 642204453419. The next prime is 642204453461. The reversal of 642204453426 is 624354402246.

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, 7648581 + ... + 7732088.

It is an arithmetic number, because the mean of its divisors is an integer number (80287097400).

Almost surely, 2^642204453426 is an apocalyptic number.

642204453426 is an abundant number, since it is smaller than the sum of its proper divisors (642389104974).

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

642204453426 is a wasteful number, since it uses less digits than its factorization.

642204453426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15387633.

The product of its (nonzero) digits is 1105920, while the sum is 42.

The spelling of 642204453426 in words is "six hundred forty-two billion, two hundred four million, four hundred fifty-three thousand, four hundred twenty-six".