64906321 has 16 divisors (see below), whose sum is σ = 69753600. Its totient is φ = 60278400.

The previous prime is 64906301. The next prime is 64906327. The reversal of 64906321 is 12360946.

It is a cyclic number.

It is not a de Polignac number, because 64906321 - 2¹⁵ = 64873553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64906327) 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, 93586 + ... + 94276.

It is an arithmetic number, because the mean of its divisors is an integer number (4359600).

Almost surely, 2^64906321 is an apocalyptic number.

It is an amenable number.

64906321 is a deficient number, since it is larger than the sum of its proper divisors (4847279).

64906321 is a wasteful number, since it uses less digits than its factorization.

64906321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 64906321 is about 8056.4459285717. The cubic root of 64906321 is about 401.8793252632.

The spelling of 64906321 in words is "sixty-four million, nine hundred six thousand, three hundred twenty-one".