64168422639 has 32 divisors (see below), whose sum is σ = 88465970880. Its totient is φ = 41345740800.

The previous prime is 64168422631. The next prime is 64168422653. The reversal of 64168422639 is 93622486146.

It is not a de Polignac number, because 64168422639 - 2³ = 64168422631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64168422591 and 64168422600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64168422631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8775717 + ... + 8783025.

It is an arithmetic number, because the mean of its divisors is an integer number (2764561590).

Almost surely, 2^64168422639 is an apocalyptic number.

64168422639 is a deficient number, since it is larger than the sum of its proper divisors (24297548241).

64168422639 is a wasteful number, since it uses less digits than its factorization.

64168422639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8011.

The product of its digits is 2985984, while the sum is 51.

The spelling of 64168422639 in words is "sixty-four billion, one hundred sixty-eight million, four hundred twenty-two thousand, six hundred thirty-nine".