64273663 has 4 divisors (see below), whose sum is σ = 64379128. Its totient is φ = 64168200.

The previous prime is 64273631. The next prime is 64273667. The reversal of 64273663 is 36637246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36637246 = 2 ⋅18318623.

It is a cyclic number.

It is not a de Polignac number, because 64273663 - 2⁵ = 64273631 is a prime.

It is a super-2 number, since 2×64273663² = 8262207510875138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64273667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51813 + ... + 53038.

It is an arithmetic number, because the mean of its divisors is an integer number (16094782).

Almost surely, 2^64273663 is an apocalyptic number.

64273663 is a deficient number, since it is larger than the sum of its proper divisors (105465).

64273663 is a wasteful number, since it uses less digits than its factorization.

64273663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105464.

The product of its digits is 108864, while the sum is 37.

The square root of 64273663 is about 8017.0856924446. The cubic root of 64273663 is about 400.5693205508.

It can be divided in two parts, 642 and 73663, that added together give a triangular number (74305 = T₃₈₅).

The spelling of 64273663 in words is "sixty-four million, two hundred seventy-three thousand, six hundred sixty-three".