64433643 has 8 divisors (see below), whose sum is σ = 86092800. Its totient is φ = 42865128.

The previous prime is 64433639. The next prime is 64433653. The reversal of 64433643 is 34633446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64433643 - 2² = 64433639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64433623) 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, 20983 + ... + 23856.

It is an arithmetic number, because the mean of its divisors is an integer number (10761600).

Almost surely, 2^64433643 is an apocalyptic number.

64433643 is a deficient number, since it is larger than the sum of its proper divisors (21659157).

64433643 is a wasteful number, since it uses less digits than its factorization.

64433643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45321.

The product of its digits is 62208, while the sum is 33.

The square root of 64433643 is about 8027.0569326497. The cubic root of 64433643 is about 400.9013901305.

The spelling of 64433643 in words is "sixty-four million, four hundred thirty-three thousand, six hundred forty-three".