64522356818381 has 8 divisors (see below), whose sum is σ = 80443457851584. Its totient is φ = 50277161157120.

The previous prime is 64522356818363. The next prime is 64522356818453. The reversal of 64522356818381 is 18381865322546.

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 64522356818381 - 2¹⁸ = 64522356556237 is a prime.

It is a super-2 number, since 2×64522356818381² (a number of 28 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 (64522356818681) 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, 418976342900 + ... + 418976343053.

It is an arithmetic number, because the mean of its divisors is an integer number (10055432231448).

Almost surely, 2^{64522356818381} is an apocalyptic number.

It is an amenable number.

64522356818381 is a deficient number, since it is larger than the sum of its proper divisors (15921101033203).

64522356818381 is a wasteful number, since it uses less digits than its factorization.

64522356818381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837952685971.

The product of its digits is 66355200, while the sum is 62.

The spelling of 64522356818381 in words is "sixty-four trillion, five hundred twenty-two billion, three hundred fifty-six million, eight hundred eighteen thousand, three hundred eighty-one".