64342641686 has 16 divisors (see below), whose sum is σ = 97304094720. Its totient is φ = 31909017000.

The previous prime is 64342641683. The next prime is 64342641689. The reversal of 64342641686 is 68614624346.

It is an interprime number because it is at equal distance from previous prime (64342641683) and next prime (64342641689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64342641683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148166 + ... + 388121.

It is an arithmetic number, because the mean of its divisors is an integer number (6081505920).

Almost surely, 2^64342641686 is an apocalyptic number.

64342641686 is a deficient number, since it is larger than the sum of its proper divisors (32961453034).

64342641686 is a wasteful number, since it uses less digits than its factorization.

64342641686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536779.

The product of its digits is 3981312, while the sum is 50.

The spelling of 64342641686 in words is "sixty-four billion, three hundred forty-two million, six hundred forty-one thousand, six hundred eighty-six".