64753821 has 24 divisors (see below), whose sum is σ = 102301056. Its totient is φ = 39143040.

The previous prime is 64753807. The next prime is 64753831. The reversal of 64753821 is 12835746.

64753821 is a `hidden beast` number, since 647 + 5 + 3 + 8 + 2 + 1 = 666.

64753821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64753821 - 2¹⁴ = 64737437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64753831) 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 23 ways as a sum of consecutive naturals, for example, 58156 + ... + 59258.

It is an arithmetic number, because the mean of its divisors is an integer number (4262544).

Almost surely, 2^64753821 is an apocalyptic number.

It is an amenable number.

64753821 is a deficient number, since it is larger than the sum of its proper divisors (37547235).

64753821 is a wasteful number, since it uses less digits than its factorization.

64753821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713 (or 1710 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 64753821 is about 8046.9758916005. The cubic root of 64753821 is about 401.5643345846.

It can be divided in two parts, 6475 and 3821, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 64753821 in words is "sixty-four million, seven hundred fifty-three thousand, eight hundred twenty-one".