64763776 has 64 divisors (see below), whose sum is σ = 160882560. Its totient is φ = 25228800.

The previous prime is 64763753. The next prime is 64763779. The reversal of 64763776 is 67736746.

It is a happy number.

64763776 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64763779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6571 + ... + 13141.

It is an arithmetic number, because the mean of its divisors is an integer number (2513790).

Almost surely, 2^64763776 is an apocalyptic number.

64763776 is the 6571-st pentagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64763776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80441280).

64763776 is an abundant number, since it is smaller than the sum of its proper divisors (96118784).

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

64763776 is a wasteful number, since it uses less digits than its factorization.

64763776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6603 (or 6591 counting only the distinct ones).

The product of its digits is 889056, while the sum is 46.

The square root of 64763776 is about 8047.5944231801. The cubic root of 64763776 is about 401.5849118419.

The spelling of 64763776 in words is "sixty-four million, seven hundred sixty-three thousand, seven hundred seventy-six".