64344817405 has 16 divisors (see below), whose sum is σ = 84238167744. Its totient is φ = 46793479680.

The previous prime is 64344817399. The next prime is 64344817417. The reversal of 64344817405 is 50471844346.

It is not a de Polignac number, because 64344817405 - 2¹¹ = 64344815357 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1675954 + ... + 1713916.

It is an arithmetic number, because the mean of its divisors is an integer number (5264885484).

Almost surely, 2^64344817405 is an apocalyptic number.

It is an amenable number.

64344817405 is a deficient number, since it is larger than the sum of its proper divisors (19893350339).

64344817405 is a wasteful number, since it uses less digits than its factorization.

64344817405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68796.

The product of its (nonzero) digits is 1290240, while the sum is 46.

The spelling of 64344817405 in words is "sixty-four billion, three hundred forty-four million, eight hundred seventeen thousand, four hundred five".