64601311158 has 64 divisors (see below), whose sum is σ = 145778987520. Its totient is φ = 21201038496.

The previous prime is 64601311121. The next prime is 64601311163. The reversal of 64601311158 is 85111310646.

It is a happy number.

64601311158 is a `hidden beast` number, since 6 + 4 + 601 + 31 + 1 + 15 + 8 = 666.

It is a Curzon number.

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 9247735 + ... + 9254717.

It is an arithmetic number, because the mean of its divisors is an integer number (2277796680).

Almost surely, 2^64601311158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64601311158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72889493760).

64601311158 is an abundant number, since it is smaller than the sum of its proper divisors (81177676362).

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

64601311158 is a wasteful number, since it uses less digits than its factorization.

64601311158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9618 (or 9612 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 64601311158 in words is "sixty-four billion, six hundred one million, three hundred eleven thousand, one hundred fifty-eight".