642384777 has 8 divisors (see below), whose sum is σ = 860068000. Its totient is φ = 426479040.

The previous prime is 642384709. The next prime is 642384859. The reversal of 642384777 is 777483246.

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

It is not a de Polignac number, because 642384777 - 2¹¹ = 642382729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642384277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443527 + ... + 444972.

It is an arithmetic number, because the mean of its divisors is an integer number (107508500).

Almost surely, 2^642384777 is an apocalyptic number.

It is an amenable number.

642384777 is a deficient number, since it is larger than the sum of its proper divisors (217683223).

642384777 is a wasteful number, since it uses less digits than its factorization.

642384777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888743.

The product of its digits is 1580544, while the sum is 48.

The square root of 642384777 is about 25345.3107497225. The cubic root of 642384777 is about 862.8429339092.

The spelling of 642384777 in words is "six hundred forty-two million, three hundred eighty-four thousand, seven hundred seventy-seven".