64622945717 has 8 divisors (see below), whose sum is σ = 70611656160. Its totient is φ = 58653218160.

The previous prime is 64622945713. The next prime is 64622945719. The reversal of 64622945717 is 71754922646.

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 64622945717 - 2² = 64622945713 is a prime.

It is a super-2 number, since 2×64622945717² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64622945713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4738598 + ... + 4752215.

It is an arithmetic number, because the mean of its divisors is an integer number (8826457020).

Almost surely, 2^64622945717 is an apocalyptic number.

It is an amenable number.

64622945717 is a deficient number, since it is larger than the sum of its proper divisors (5988710443).

64622945717 is a wasteful number, since it uses less digits than its factorization.

64622945717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9491443.

The product of its digits is 5080320, while the sum is 53.

The spelling of 64622945717 in words is "sixty-four billion, six hundred twenty-two million, nine hundred forty-five thousand, seven hundred seventeen".