64819761 has 8 divisors (see below), whose sum is σ = 86583744. Its totient is φ = 43134480.

The previous prime is 64819757. The next prime is 64819771. The reversal of 64819761 is 16791846.

64819761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64819761 - 2² = 64819757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64819751) 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, 17725 + ... + 21066.

It is an arithmetic number, because the mean of its divisors is an integer number (10822968).

Almost surely, 2^64819761 is an apocalyptic number.

It is an amenable number.

64819761 is a deficient number, since it is larger than the sum of its proper divisors (21763983).

64819761 is a wasteful number, since it uses less digits than its factorization.

64819761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39351.

The product of its digits is 72576, while the sum is 42.

The square root of 64819761 is about 8051.0720404180. The cubic root of 64819761 is about 401.7005951112.

The spelling of 64819761 in words is "sixty-four million, eight hundred nineteen thousand, seven hundred sixty-one".