64519906 has 16 divisors (see below), whose sum is σ = 105765408. Its totient is φ = 29275200.

The previous prime is 64519843. The next prime is 64519907. The reversal of 64519906 is 60991546.

It is not an unprimeable number, because it can be changed into a prime (64519907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11866 + ... + 16426.

It is an arithmetic number, because the mean of its divisors is an integer number (6610338).

Almost surely, 2^64519906 is an apocalyptic number.

64519906 is a deficient number, since it is larger than the sum of its proper divisors (41245502).

64519906 is a wasteful number, since it uses less digits than its factorization.

64519906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5217.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 64519906 is about 8032.4283999299. The cubic root of 64519906 is about 401.0802176983.

The spelling of 64519906 in words is "sixty-four million, five hundred nineteen thousand, nine hundred six".