64391854 has 4 divisors (see below), whose sum is σ = 96587784. Its totient is φ = 32195926.

The previous prime is 64391827. The next prime is 64391857. The reversal of 64391854 is 45819346.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64391857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16097962 + ... + 16097965.

It is an arithmetic number, because the mean of its divisors is an integer number (24146946).

Almost surely, 2^64391854 is an apocalyptic number.

64391854 is a deficient number, since it is larger than the sum of its proper divisors (32195930).

64391854 is a wasteful number, since it uses less digits than its factorization.

64391854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32195929.

The product of its digits is 103680, while the sum is 40.

The square root of 64391854 is about 8024.4535016411. The cubic root of 64391854 is about 400.8147020250.

The spelling of 64391854 in words is "sixty-four million, three hundred ninety-one thousand, eight hundred fifty-four".