642604419 has 24 divisors (see below), whose sum is σ = 954668832. Its totient is φ = 416223360.

The previous prime is 642604399. The next prime is 642604441. The reversal of 642604419 is 914406246.

642604419 is a `hidden beast` number, since 6 + 4 + 2 + 604 + 41 + 9 = 666.

642604419 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-642604419 is a prime.

It is a super-2 number, since 2×642604419² = 825880878636655122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642604019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 433159 + ... + 434639.

It is an arithmetic number, because the mean of its divisors is an integer number (39777868).

Almost surely, 2^642604419 is an apocalyptic number.

642604419 is a deficient number, since it is larger than the sum of its proper divisors (312064413).

642604419 is a wasteful number, since it uses less digits than its factorization.

642604419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2827 (or 2824 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 642604419 is about 25349.6433702725. The cubic root of 642604419 is about 862.9412628023.

The spelling of 642604419 in words is "six hundred forty-two million, six hundred four thousand, four hundred nineteen".