64940016 has 20 divisors (see below), whose sum is σ = 167761832. Its totient is φ = 21646656.

The previous prime is 64939993. The next prime is 64940021. The reversal of 64940016 is 61004946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676411 + ... + 676506.

Almost surely, 2^64940016 is an apocalyptic number.

It is an amenable number.

64940016 is an abundant number, since it is smaller than the sum of its proper divisors (102821816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64940016 is a wasteful number, since it uses less digits than its factorization.

64940016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1352928 (or 1352922 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 64940016 is about 8058.5368398984. The cubic root of 64940016 is about 401.9488561455.

The spelling of 64940016 in words is "sixty-four million, nine hundred forty thousand, sixteen".