64643135116 has 24 divisors (see below), whose sum is σ = 134907413760. Its totient is φ = 26499670032.

The previous prime is 64643135077. The next prime is 64643135119. The reversal of 64643135116 is 61153134646.

It is not an unprimeable number, because it can be changed into a prime (64643135119) 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 7 ways as a sum of consecutive naturals, for example, 50188126 + ... + 50189413.

It is an arithmetic number, because the mean of its divisors is an integer number (5621142240).

Almost surely, 2^64643135116 is an apocalyptic number.

It is an amenable number.

64643135116 is an abundant number, since it is smaller than the sum of its proper divisors (70264278644).

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

64643135116 is a wasteful number, since it uses less digits than its factorization.

64643135116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100377573 (or 100377571 counting only the distinct ones).

The product of its digits is 155520, while the sum is 40.

The spelling of 64643135116 in words is "sixty-four billion, six hundred forty-three million, one hundred thirty-five thousand, one hundred sixteen".