64440233204405 has 8 divisors (see below), whose sum is σ = 77482014003072. Its totient is φ = 51449697125008.

The previous prime is 64440233204351. The next prime is 64440233204419. The reversal of 64440233204405 is 50440233204446.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64440233204405 - 2³² = 64435938237109 is a prime.

It is a super-2 number, since 2×64440233204405² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12811177049 + ... + 12811182078.

It is an arithmetic number, because the mean of its divisors is an integer number (9685251750384).

Almost surely, 2^{64440233204405} is an apocalyptic number.

It is an amenable number.

64440233204405 is a deficient number, since it is larger than the sum of its proper divisors (13041780798667).

64440233204405 is a wasteful number, since it uses less digits than its factorization.

64440233204405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25622359635.

The product of its (nonzero) digits is 1105920, while the sum is 41.

Adding to 64440233204405 its sum of digits (41), we get a palindrome (64440233204446).

The spelling of 64440233204405 in words is "sixty-four trillion, four hundred forty billion, two hundred thirty-three million, two hundred four thousand, four hundred five".