64281916 has 12 divisors (see below), whose sum is σ = 114400440. Its totient is φ = 31596080.

The previous prime is 64281869. The next prime is 64281937. The reversal of 64281916 is 61918246.

It is a happy number.

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, 135955 + ... + 136426.

It is an arithmetic number, because the mean of its divisors is an integer number (9533370).

Almost surely, 2^64281916 is an apocalyptic number.

It is an amenable number.

64281916 is a deficient number, since it is larger than the sum of its proper divisors (50118524).

64281916 is a wasteful number, since it uses less digits than its factorization.

64281916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272444 (or 272442 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 64281916 is about 8017.6003891439. The cubic root of 64281916 is about 400.5864647276.

The spelling of 64281916 in words is "sixty-four million, two hundred eighty-one thousand, nine hundred sixteen".