642646306106 has 32 divisors (see below), whose sum is σ = 1140866944128. Its totient is φ = 265793336640.

The previous prime is 642646306087. The next prime is 642646306117. The reversal of 642646306106 is 601603646246.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7053920 + ... + 7144443.

It is an arithmetic number, because the mean of its divisors is an integer number (35652092004).

Almost surely, 2^642646306106 is an apocalyptic number.

642646306106 is a deficient number, since it is larger than the sum of its proper divisors (498220638022).

642646306106 is a wasteful number, since it uses less digits than its factorization.

642646306106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14198486.

The product of its (nonzero) digits is 746496, while the sum is 44.

The spelling of 642646306106 in words is "six hundred forty-two billion, six hundred forty-six million, three hundred six thousand, one hundred six".