64781146 has 16 divisors (see below), whose sum is σ = 103966560. Its totient is φ = 30181680.

The previous prime is 64781131. The next prime is 64781147. The reversal of 64781146 is 64118746.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64781147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11656 + ... + 16291.

It is an arithmetic number, because the mean of its divisors is an integer number (6497910).

Almost surely, 2^64781146 is an apocalyptic number.

64781146 is a deficient number, since it is larger than the sum of its proper divisors (39185414).

64781146 is a wasteful number, since it uses less digits than its factorization.

64781146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28029.

The product of its digits is 32256, while the sum is 37.

The square root of 64781146 is about 8048.6735553133. The cubic root of 64781146 is about 401.6208110581.

The spelling of 64781146 in words is "sixty-four million, seven hundred eighty-one thousand, one hundred forty-six".