8613955640772 has 18 divisors (see below), whose sum is σ = 21774165647598. Its totient is φ = 2871318546912.

The previous prime is 8613955640753. The next prime is 8613955640777. The reversal of 8613955640772 is 2770465593168.

8613955640772 is a `hidden beast` number, since 8 + 6 + 1 + 3 + 9 + 556 + 4 + 0 + 7 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8599521060036 + 14434580736 = 2932494^2 + 120144^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (8613955640777) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 119638272753 + ... + 119638272824.

It is an arithmetic number, because the mean of its divisors is an integer number (1209675869311).

It is a 1-persistent number, because it is pandigital, but 2⋅8613955640772 = 17227911281544 is not.

Almost surely, 2^{8613955640772} is an apocalyptic number.

It is an amenable number.

8613955640772 is an abundant number, since it is smaller than the sum of its proper divisors (13160210006826).

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

8613955640772 is a wasteful number, since it uses less digits than its factorization.

8613955640772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239276545587 (or 239276545582 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 63.

The spelling of 8613955640772 in words is "eight trillion, six hundred thirteen billion, nine hundred fifty-five million, six hundred forty thousand, seven hundred seventy-two".