64549935216 has 120 divisors (see below), whose sum is σ = 195565982976. Its totient is φ = 19757422080.

The previous prime is 64549935113. The next prime is 64549935217. The reversal of 64549935216 is 61253994546.

64549935216 is a `hidden beast` number, since 6 + 4 + 549 + 93 + 5 + 2 + 1 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64549935217) 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 23 ways as a sum of consecutive naturals, for example, 267286 + ... + 447818.

Almost surely, 2^64549935216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64549935216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97782991488).

64549935216 is an abundant number, since it is smaller than the sum of its proper divisors (131016047760).

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

64549935216 is a wasteful number, since it uses less digits than its factorization.

64549935216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180751 (or 180742 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The spelling of 64549935216 in words is "sixty-four billion, five hundred forty-nine million, nine hundred thirty-five thousand, two hundred sixteen".