64670654916 has 108 divisors (see below), whose sum is σ = 191214086700. Its totient is φ = 18375154560.

The previous prime is 64670654899. The next prime is 64670654957. The reversal of 64670654916 is 61945607646.

It can be written as a sum of positive squares in 2 ways, for example, as 34727813316 + 29942841600 = 186354^2 + 173040^2 .

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 35 ways as a sum of consecutive naturals, for example, 218010 + ... + 420558.

Almost surely, 2^64670654916 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 64670654916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95607043350).

64670654916 is an abundant number, since it is smaller than the sum of its proper divisors (126543431784).

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

64670654916 is a wasteful number, since it uses less digits than its factorization.

64670654916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202754 (or 202742 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 64670654916 in words is "sixty-four billion, six hundred seventy million, six hundred fifty-four thousand, nine hundred sixteen".