642634604215 has 8 divisors (see below), whose sum is σ = 771393194640. Its totient is φ = 513953236992.

The previous prime is 642634604207. The next prime is 642634604257. The reversal of 642634604215 is 512406436246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642634604215 - 2³ = 642634604207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19287489 + ... + 19320778.

It is an arithmetic number, because the mean of its divisors is an integer number (96424149330).

Almost surely, 2^642634604215 is an apocalyptic number.

642634604215 is a deficient number, since it is larger than the sum of its proper divisors (128758590425).

642634604215 is a wasteful number, since it uses less digits than its factorization.

642634604215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38611601.

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 642634604215 in words is "six hundred forty-two billion, six hundred thirty-four million, six hundred four thousand, two hundred fifteen".