64144718 has 16 divisors (see below), whose sum is σ = 105197184. Its totient is φ = 29091960.

The previous prime is 64144711. The next prime is 64144721. The reversal of 64144718 is 81744146.

It is a super-2 number, since 2×64144718² = 8229089694599048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64144711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7721 + ... + 13707.

It is an arithmetic number, because the mean of its divisors is an integer number (6574824).

Almost surely, 2^64144718 is an apocalyptic number.

64144718 is a deficient number, since it is larger than the sum of its proper divisors (41052466).

64144718 is a wasteful number, since it uses less digits than its factorization.

64144718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6487.

The product of its digits is 21504, while the sum is 35.

The square root of 64144718 is about 8009.0397676625. The cubic root of 64144718 is about 400.3012688690.

The spelling of 64144718 in words is "sixty-four million, one hundred forty-four thousand, seven hundred eighteen".