7884968081 has 4 divisors (see below), whose sum is σ = 7914280500. Its totient is φ = 7855655664.

The previous prime is 7884968057. The next prime is 7884968089. The reversal of 7884968081 is 1808694887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1808694887 = 233 ⋅7762639.

It can be written as a sum of positive squares in 2 ways, for example, as 279558400 + 7605409681 = 16720^2 + 87209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7884968081 is a prime.

It is a super-2 number, since 2×7884968081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7884968081.

It is not an unprimeable number, because it can be changed into a prime (7884968089) 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, 14655806 + ... + 14656343.

It is an arithmetic number, because the mean of its divisors is an integer number (1978570125).

Almost surely, 2^7884968081 is an apocalyptic number.

It is an amenable number.

7884968081 is a deficient number, since it is larger than the sum of its proper divisors (29312419).

7884968081 is a wasteful number, since it uses less digits than its factorization.

7884968081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29312418.

The product of its (nonzero) digits is 6193152, while the sum is 59.

The square root of 7884968081 is about 88797.3427586659. The cubic root of 7884968081 is about 1990.3676905321.

The spelling of 7884968081 in words is "seven billion, eight hundred eighty-four million, nine hundred sixty-eight thousand, eighty-one".