64134726672 has 20 divisors (see below), whose sum is σ = 165681377360. Its totient is φ = 21378242208.

The previous prime is 64134726659. The next prime is 64134726679. The reversal of 64134726672 is 27662743146.

It is a super-2 number, since 2×64134726672² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1336140139 = 64134726672 / (6 + 4 + 1 + 3 + 4 + 7 + 2 + 6 + 6 + 7 + 2).

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (64134726679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668070022 + ... + 668070117.

It is an arithmetic number, because the mean of its divisors is an integer number (8284068868).

Almost surely, 2^64134726672 is an apocalyptic number.

It is an amenable number.

64134726672 is an abundant number, since it is smaller than the sum of its proper divisors (101546650688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64134726672 is a wasteful number, since it uses less digits than its factorization.

64134726672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336140150 (or 1336140144 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 48.

The spelling of 64134726672 in words is "sixty-four billion, one hundred thirty-four million, seven hundred twenty-six thousand, six hundred seventy-two".