64421773 has 16 divisors (see below), whose sum is σ = 72352000. Its totient is φ = 56966976.

The previous prime is 64421767. The next prime is 64421803. The reversal of 64421773 is 37712446.

It is not a de Polignac number, because 64421773 - 2¹³ = 64413581 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 (64421713) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31228 + ... + 33226.

It is an arithmetic number, because the mean of its divisors is an integer number (4522000).

Almost surely, 2^64421773 is an apocalyptic number.

It is an amenable number.

64421773 is a deficient number, since it is larger than the sum of its proper divisors (7930227).

64421773 is a wasteful number, since it uses less digits than its factorization.

64421773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116.

The product of its digits is 28224, while the sum is 34.

The square root of 64421773 is about 8026.3175242449. The cubic root of 64421773 is about 400.8767705294.

The spelling of 64421773 in words is "sixty-four million, four hundred twenty-one thousand, seven hundred seventy-three".