64436726 has 4 divisors (see below), whose sum is σ = 96655092. Its totient is φ = 32218362.

The previous prime is 64436719. The next prime is 64436737. The reversal of 64436726 is 62763446.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64436726.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16109180 + ... + 16109183.

It is an arithmetic number, because the mean of its divisors is an integer number (24163773).

Almost surely, 2^64436726 is an apocalyptic number.

64436726 is a deficient number, since it is larger than the sum of its proper divisors (32218366).

64436726 is a wasteful number, since it uses less digits than its factorization.

64436726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32218365.

The product of its digits is 145152, while the sum is 38.

The square root of 64436726 is about 8027.2489683577. The cubic root of 64436726 is about 400.9077840949.

The spelling of 64436726 in words is "sixty-four million, four hundred thirty-six thousand, seven hundred twenty-six".