64641394 has 8 divisors (see below), whose sum is σ = 97660080. Its totient is φ = 32088036.

The previous prime is 64641391. The next prime is 64641407. The reversal of 64641394 is 49314646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64641391) 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, 115984 + ... + 116539.

It is an arithmetic number, because the mean of its divisors is an integer number (12207510).

Almost surely, 2^64641394 is an apocalyptic number.

64641394 is a deficient number, since it is larger than the sum of its proper divisors (33018686).

64641394 is a wasteful number, since it uses less digits than its factorization.

64641394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232664.

The product of its digits is 62208, while the sum is 37.

The square root of 64641394 is about 8039.9871890445. The cubic root of 64641394 is about 401.3317983616.

The spelling of 64641394 in words is "sixty-four million, six hundred forty-one thousand, three hundred ninety-four".