64344817406 has 4 divisors (see below), whose sum is σ = 96517226112. Its totient is φ = 32172408702.

The previous prime is 64344817399. The next prime is 64344817417. The reversal of 64344817406 is 60471844346.

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

It is a super-2 number, since 2×64344817406² (a number of 22 digits) contains 22 as substring.

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, 16086204350 + ... + 16086204353.

It is an arithmetic number, because the mean of its divisors is an integer number (24129306528).

Almost surely, 2^64344817406 is an apocalyptic number.

64344817406 is a deficient number, since it is larger than the sum of its proper divisors (32172408706).

64344817406 is a wasteful number, since it uses less digits than its factorization.

64344817406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32172408705.

The product of its (nonzero) digits is 1548288, while the sum is 47.

The spelling of 64344817406 in words is "sixty-four billion, three hundred forty-four million, eight hundred seventeen thousand, four hundred six".