642511303166 has 8 divisors (see below), whose sum is σ = 964673606064. Its totient is φ = 320953434480.

The previous prime is 642511303123. The next prime is 642511303169. The reversal of 642511303166 is 661303115246.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642511303169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151105895 + ... + 151110146.

It is an arithmetic number, because the mean of its divisors is an integer number (120584200758).

Almost surely, 2^642511303166 is an apocalyptic number.

642511303166 is a deficient number, since it is larger than the sum of its proper divisors (322162302898).

642511303166 is a wasteful number, since it uses less digits than its factorization.

642511303166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302217106.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 642511303166 in words is "six hundred forty-two billion, five hundred eleven million, three hundred three thousand, one hundred sixty-six".