8479961661793 has 4 divisors (see below), whose sum is σ = 8523007152660. Its totient is φ = 8436916170928.

The previous prime is 8479961661737. The next prime is 8479961661839. The reversal of 8479961661793 is 3971661699748.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8238007857249 + 241953804544 = 2870193^2 + 491888^2 .

It is a cyclic number.

It is not a de Polignac number, because 8479961661793 - 2¹³ = 8479961653601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8479961661593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21522745138 + ... + 21522745531.

It is an arithmetic number, because the mean of its divisors is an integer number (2130751788165).

Almost surely, 2^{8479961661793} is an apocalyptic number.

It is an amenable number.

8479961661793 is a deficient number, since it is larger than the sum of its proper divisors (43045490867).

8479961661793 is a wasteful number, since it uses less digits than its factorization.

8479961661793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43045490866.

The product of its digits is 740710656, while the sum is 76.

The spelling of 8479961661793 in words is "eight trillion, four hundred seventy-nine billion, nine hundred sixty-one million, six hundred sixty-one thousand, seven hundred ninety-three".