79755656384640 has 64 divisors (see below), whose sum is σ = 254221154732160. Its totient is φ = 21268175035392.

The previous prime is 79755656384543. The next prime is 79755656384641. The reversal of 79755656384640 is 4648365655797.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×79755656384640³ (a number of 43 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (79755656384641) 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, 20769700264 + ... + 20769704103.

It is an arithmetic number, because the mean of its divisors is an integer number (3972205542690).

Almost surely, 2^{79755656384640} is an apocalyptic number.

It is an amenable number.

79755656384640 is an abundant number, since it is smaller than the sum of its proper divisors (174465498347520).

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

79755656384640 is a wasteful number, since it uses less digits than its factorization.

79755656384640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41539404389 (or 41539404377 counting only the distinct ones).

The product of its (nonzero) digits is 4572288000, while the sum is 75.

The spelling of 79755656384640 in words is "seventy-nine trillion, seven hundred fifty-five billion, six hundred fifty-six million, three hundred eighty-four thousand, six hundred forty".