64227766016 has 72 divisors (see below), whose sum is σ = 132400623264. Its totient is φ = 31072481280.

The previous prime is 64227766013. The next prime is 64227766019. The reversal of 64227766016 is 61066772246.

64227766016 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64227766013) and next prime (64227766019).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64227766013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1695701 + ... + 1733163.

Almost surely, 2^64227766016 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 64227766016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66200311632).

64227766016 is an abundant number, since it is smaller than the sum of its proper divisors (68172857248).

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

64227766016 is a wasteful number, since it uses less digits than its factorization.

64227766016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37697 (or 37683 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 64227766016 in words is "sixty-four billion, two hundred twenty-seven million, seven hundred sixty-six thousand, sixteen".