64155368672 has 96 divisors (see below), whose sum is σ = 135988554240. Its totient is φ = 29683906560.

The previous prime is 64155368663. The next prime is 64155368687. The reversal of 64155368672 is 27686355146.

It is a happy number.

It is a super-2 number, since 2×64155368672² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24017897 + ... + 24020567.

It is an arithmetic number, because the mean of its divisors is an integer number (1416547440).

Almost surely, 2^64155368672 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 64155368672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67994277120).

64155368672 is an abundant number, since it is smaller than the sum of its proper divisors (71833185568).

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

64155368672 is a wasteful number, since it uses less digits than its factorization.

64155368672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3424 (or 3416 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 53.

The spelling of 64155368672 in words is "sixty-four billion, one hundred fifty-five million, three hundred sixty-eight thousand, six hundred seventy-two".