64218717196 has 48 divisors (see below), whose sum is σ = 122903071200. Its totient is φ = 29244160512.

The previous prime is 64218717193. The next prime is 64218717209. The reversal of 64218717196 is 69171781246.

It is a happy number.

It is a super-2 number, since 2×64218717196² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64218717193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451006 + ... + 576058.

It is an arithmetic number, because the mean of its divisors is an integer number (2560480650).

Almost surely, 2^64218717196 is an apocalyptic number.

It is an amenable number.

64218717196 is a deficient number, since it is larger than the sum of its proper divisors (58684354004).

64218717196 is a wasteful number, since it uses less digits than its factorization.

64218717196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125338 (or 125336 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 52.

The spelling of 64218717196 in words is "sixty-four billion, two hundred eighteen million, seven hundred seventeen thousand, one hundred ninety-six".