64989716 has 12 divisors (see below), whose sum is σ = 124071360. Its totient is φ = 29540760.

The previous prime is 64989707. The next prime is 64989719. The reversal of 64989716 is 61798946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64989719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738476 + ... + 738563.

It is an arithmetic number, because the mean of its divisors is an integer number (10339280).

Almost surely, 2^64989716 is an apocalyptic number.

It is an amenable number.

64989716 is a deficient number, since it is larger than the sum of its proper divisors (59081644).

64989716 is a wasteful number, since it uses less digits than its factorization.

64989716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477054 (or 1477052 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 64989716 is about 8061.6199364644. The cubic root of 64989716 is about 402.0513700514.

The spelling of 64989716 in words is "sixty-four million, nine hundred eighty-nine thousand, seven hundred sixteen".