64126521722 has 8 divisors (see below), whose sum is σ = 96191783616. Its totient is φ = 32062593852.

The previous prime is 64126521721. The next prime is 64126521773. The reversal of 64126521722 is 22712562146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×64126521722² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64126521721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203138 + ... + 411725.

It is an arithmetic number, because the mean of its divisors is an integer number (12023972952).

Almost surely, 2^64126521722 is an apocalyptic number.

64126521722 is a deficient number, since it is larger than the sum of its proper divisors (32065261894).

64126521722 is a wasteful number, since it uses less digits than its factorization.

64126521722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667012.

The product of its digits is 80640, while the sum is 38.

The spelling of 64126521722 in words is "sixty-four billion, one hundred twenty-six million, five hundred twenty-one thousand, seven hundred twenty-two".