64778330960 has 120 divisors (see below), whose sum is σ = 181661872896. Its totient is φ = 21040715520.

The previous prime is 64778330957. The next prime is 64778330993. The reversal of 64778330960 is 6903387746.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41945 + ... + 362375.

Almost surely, 2^64778330960 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 64778330960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90830936448).

64778330960 is an abundant number, since it is smaller than the sum of its proper divisors (116883541936).

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

64778330960 is a wasteful number, since it uses less digits than its factorization.

64778330960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320489 (or 320464 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 53.

The spelling of 64778330960 in words is "sixty-four billion, seven hundred seventy-eight million, three hundred thirty thousand, nine hundred sixty".