64273641 has 4 divisors (see below), whose sum is σ = 85698192. Its totient is φ = 42849092.

The previous prime is 64273631. The next prime is 64273667. The reversal of 64273641 is 14637246.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64273641 - 2⁷ = 64273513 is a prime.

It is a super-2 number, since 2×64273641² = 8262201854793762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64273631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10712271 + ... + 10712276.

It is an arithmetic number, because the mean of its divisors is an integer number (21424548).

Almost surely, 2^64273641 is an apocalyptic number.

It is an amenable number.

64273641 is a deficient number, since it is larger than the sum of its proper divisors (21424551).

64273641 is a wasteful number, since it uses less digits than its factorization.

64273641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21424550.

The product of its digits is 24192, while the sum is 33.

The square root of 64273641 is about 8017.0843203748. The cubic root of 64273641 is about 400.5692748477.

The spelling of 64273641 in words is "sixty-four million, two hundred seventy-three thousand, six hundred forty-one".