64236656268 has 36 divisors (see below), whose sum is σ = 162392998768. Its totient is φ = 21409976160.

The previous prime is 64236656257. The next prime is 64236656317. The reversal of 64236656268 is 86265663246.

It is a happy number.

64236656268 is a `hidden beast` number, since 6 + 4 + 2 + 3 + 6 + 6 + 5 + 626 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 274953 + ... + 451743.

Almost surely, 2^64236656268 is an apocalyptic number.

It is an amenable number.

64236656268 is an abundant number, since it is smaller than the sum of its proper divisors (98156342500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64236656268 is a wasteful number, since it uses less digits than its factorization.

64236656268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186894 (or 186889 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 54.

The spelling of 64236656268 in words is "sixty-four billion, two hundred thirty-six million, six hundred fifty-six thousand, two hundred sixty-eight".