64436633 has 4 divisors (see below), whose sum is σ = 64503168. Its totient is φ = 64370100.

The previous prime is 64436629. The next prime is 64436641. The reversal of 64436633 is 33663446.

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 64436633 - 2² = 64436629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64436593 and 64436602.

It is not an unprimeable number, because it can be changed into a prime (64436663) 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, 31793 + ... + 33758.

It is an arithmetic number, because the mean of its divisors is an integer number (16125792).

Almost surely, 2^64436633 is an apocalyptic number.

It is an amenable number.

64436633 is a deficient number, since it is larger than the sum of its proper divisors (66535).

64436633 is an equidigital number, since it uses as much as digits as its factorization.

64436633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66534.

The product of its digits is 93312, while the sum is 35.

The square root of 64436633 is about 8027.2431755865. The cubic root of 64436633 is about 400.9075912213.

The spelling of 64436633 in words is "sixty-four million, four hundred thirty-six thousand, six hundred thirty-three".