642763958 has 8 divisors (see below), whose sum is σ = 1014890520. Its totient is φ = 304467120.

The previous prime is 642763949. The next prime is 642763969. The reversal of 642763958 is 859367246.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8457383 + ... + 8457458.

It is an arithmetic number, because the mean of its divisors is an integer number (126861315).

Almost surely, 2^642763958 is an apocalyptic number.

642763958 is a deficient number, since it is larger than the sum of its proper divisors (372126562).

642763958 is a wasteful number, since it uses less digits than its factorization.

642763958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16914862.

The product of its digits is 2177280, while the sum is 50.

The square root of 642763958 is about 25352.7899450928. The cubic root of 642763958 is about 863.0126708569.

The spelling of 642763958 in words is "six hundred forty-two million, seven hundred sixty-three thousand, nine hundred fifty-eight".