64749368 has 8 divisors (see below), whose sum is σ = 121405080. Its totient is φ = 32374680.

The previous prime is 64749361. The next prime is 64749389. The reversal of 64749368 is 86394746.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64749361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4046828 + ... + 4046843.

It is an arithmetic number, because the mean of its divisors is an integer number (15175635).

Almost surely, 2^64749368 is an apocalyptic number.

It is an amenable number.

64749368 is a deficient number, since it is larger than the sum of its proper divisors (56655712).

64749368 is a wasteful number, since it uses less digits than its factorization.

64749368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093677 (or 8093673 counting only the distinct ones).

The product of its digits is 870912, while the sum is 47.

The square root of 64749368 is about 8046.6991990505. The cubic root of 64749368 is about 401.5551294291. Note that the first 3 decimals are identical.

The spelling of 64749368 in words is "sixty-four million, seven hundred forty-nine thousand, three hundred sixty-eight".