7963279879681 has 4 divisors (see below), whose sum is σ = 9100891291072. Its totient is φ = 6825668468292.

The previous prime is 7963279879679. The next prime is 7963279879691. The reversal of 7963279879681 is 1869789723697.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7963279879681 - 2¹ = 7963279879679 is a prime.

It is a super-2 number, since 2×7963279879681² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7963279879595 and 7963279879604.

It is not an unprimeable number, because it can be changed into a prime (7963279879601) 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 3 ways as a sum of consecutive naturals, for example, 568805705685 + ... + 568805705698.

It is an arithmetic number, because the mean of its divisors is an integer number (2275222822768).

Almost surely, 2^{7963279879681} is an apocalyptic number.

It is an amenable number.

7963279879681 is a deficient number, since it is larger than the sum of its proper divisors (1137611411391).

7963279879681 is a wasteful number, since it uses less digits than its factorization.

7963279879681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137611411390.

The product of its digits is 3456649728, while the sum is 82.

The spelling of 7963279879681 in words is "seven trillion, nine hundred sixty-three billion, two hundred seventy-nine million, eight hundred seventy-nine thousand, six hundred eighty-one".