64064642242 has 4 divisors (see below), whose sum is σ = 96096963366. Its totient is φ = 32032321120.

The previous prime is 64064642183. The next prime is 64064642311. The reversal of 64064642242 is 24224646046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46006389081 + 18058253161 = 214491^2 + 134381^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64064642195 and 64064642204.

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 as a sum of consecutive naturals, namely, 16016160559 + ... + 16016160562.

Almost surely, 2^64064642242 is an apocalyptic number.

64064642242 is a deficient number, since it is larger than the sum of its proper divisors (32032321124).

64064642242 is a wasteful number, since it uses less digits than its factorization.

64064642242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32032321123.

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 64064642242 in words is "sixty-four billion, sixty-four million, six hundred forty-two thousand, two hundred forty-two".