642818854 has 8 divisors (see below), whose sum is σ = 980035488. Its totient is φ = 316140360.

The previous prime is 642818831. The next prime is 642818863. The reversal of 642818854 is 458818246.

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

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, 2634382 + ... + 2634625.

It is an arithmetic number, because the mean of its divisors is an integer number (122504436).

Almost surely, 2^642818854 is an apocalyptic number.

642818854 is a deficient number, since it is larger than the sum of its proper divisors (337216634).

642818854 is a wasteful number, since it uses less digits than its factorization.

642818854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5269070.

The product of its digits is 491520, while the sum is 46.

The square root of 642818854 is about 25353.8725641666. The cubic root of 642818854 is about 863.0372390230.

The spelling of 642818854 in words is "six hundred forty-two million, eight hundred eighteen thousand, eight hundred fifty-four".