64249328136 has 64 divisors (see below), whose sum is σ = 188530865280. Its totient is φ = 17860815360.

The previous prime is 64249328119. The next prime is 64249328137. The reversal of 64249328136 is 63182394246.

It is not an unprimeable number, because it can be changed into a prime (64249328137) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5161845 + ... + 5174276.

It is an arithmetic number, because the mean of its divisors is an integer number (2945794770).

Almost surely, 2^64249328136 is an apocalyptic number.

It is an amenable number.

64249328136 is an abundant number, since it is smaller than the sum of its proper divisors (124281537144).

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

64249328136 is a wasteful number, since it uses less digits than its factorization.

64249328136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10336174 (or 10336170 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 48.

The spelling of 64249328136 in words is "sixty-four billion, two hundred forty-nine million, three hundred twenty-eight thousand, one hundred thirty-six".