64478773 has 16 divisors (see below), whose sum is σ = 70882560. Its totient is φ = 58406400.

The previous prime is 64478747. The next prime is 64478779. The reversal of 64478773 is 37787446.

It is a cyclic number.

It is not a de Polignac number, because 64478773 - 2⁵ = 64478741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64478779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54478 + ... + 55648.

It is an arithmetic number, because the mean of its divisors is an integer number (4430160).

Almost surely, 2^64478773 is an apocalyptic number.

It is an amenable number.

64478773 is a deficient number, since it is larger than the sum of its proper divisors (6403787).

64478773 is a wasteful number, since it uses less digits than its factorization.

64478773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308.

The product of its digits is 790272, while the sum is 46.

The square root of 64478773 is about 8029.8675580610. The cubic root of 64478773 is about 400.9949668006.

The spelling of 64478773 in words is "sixty-four million, four hundred seventy-eight thousand, seven hundred seventy-three".