642646306149 has 8 divisors (see below), whose sum is σ = 860539260672. Its totient is φ = 426592111200.

The previous prime is 642646306129. The next prime is 642646306213. The reversal of 642646306149 is 941603646246.

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

It is not a de Polignac number, because 642646306149 - 2⁵ = 642646306117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642646306129) by changing a digit.

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, 459689077 + ... + 459690474.

It is an arithmetic number, because the mean of its divisors is an integer number (107567407584).

Almost surely, 2^642646306149 is an apocalyptic number.

It is an amenable number.

642646306149 is a deficient number, since it is larger than the sum of its proper divisors (217892954523).

642646306149 is a wasteful number, since it uses less digits than its factorization.

642646306149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919379787.

The product of its (nonzero) digits is 4478976, while the sum is 51.

The spelling of 642646306149 in words is "six hundred forty-two billion, six hundred forty-six million, three hundred six thousand, one hundred forty-nine".