64120320312 has 128 divisors (see below), whose sum is σ = 169040520000. Its totient is φ = 20238704640.

The previous prime is 64120320289. The next prime is 64120320331. The reversal of 64120320312 is 21302302146.

It is a super-2 number, since 2×64120320312² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15834064 + ... + 15838112.

Almost surely, 2^64120320312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64120320312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84520260000).

64120320312 is an abundant number, since it is smaller than the sum of its proper divisors (104920199688).

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

64120320312 is a wasteful number, since it uses less digits than its factorization.

64120320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4521 (or 4517 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 64120320312 its reverse (21302302146), we get a palindrome (85422622458).

The spelling of 64120320312 in words is "sixty-four billion, one hundred twenty million, three hundred twenty thousand, three hundred twelve".