64273718 has 4 divisors (see below), whose sum is σ = 96410580. Its totient is φ = 32136858.

The previous prime is 64273717. The next prime is 64273721. The reversal of 64273718 is 81737246.

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

It is a super-2 number, since 2×64273718² = 8262221651087048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64273717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16068428 + ... + 16068431.

It is an arithmetic number, because the mean of its divisors is an integer number (24102645).

Almost surely, 2^64273718 is an apocalyptic number.

64273718 is a deficient number, since it is larger than the sum of its proper divisors (32136862).

64273718 is a wasteful number, since it uses less digits than its factorization.

64273718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32136861.

The product of its digits is 56448, while the sum is 38.

The square root of 64273718 is about 8017.0891226180. The cubic root of 64273718 is about 400.5694348087.

It can be divided in two parts, 6 and 4273718, that added together give a palindrome (4273724).

The spelling of 64273718 in words is "sixty-four million, two hundred seventy-three thousand, seven hundred eighteen".