64648773 has 80 divisors (see below), whose sum is σ = 123361920. Its totient is φ = 32845824.

The previous prime is 64648757. The next prime is 64648777. The reversal of 64648773 is 37784646.

It is not a de Polignac number, because 64648773 - 2⁴ = 64648757 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64648777) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 182965 + ... + 183317.

It is an arithmetic number, because the mean of its divisors is an integer number (1542024).

Almost surely, 2^64648773 is an apocalyptic number.

64648773 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

64648773 is a deficient number, since it is larger than the sum of its proper divisors (58713147).

64648773 is a wasteful number, since it uses less digits than its factorization.

64648773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 399 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 64648773 is about 8040.4460697153. The cubic root of 64648773 is about 401.3470688381.

The spelling of 64648773 in words is "sixty-four million, six hundred forty-eight thousand, seven hundred seventy-three".