7971261954979 has 2 divisors, whose sum is σ = 7971261954980. Its totient is φ = 7971261954978.

The previous prime is 7971261954917. The next prime is 7971261955049. The reversal of 7971261954979 is 9794591621797.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7971261954979 - 2²³ = 7971253566371 is a prime.

It is not a weakly prime, because it can be changed into another prime (7971261954179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3985630977489 + 3985630977490.

It is an arithmetic number, because the mean of its divisors is an integer number (3985630977490).

Almost surely, 2^{7971261954979} is an apocalyptic number.

7971261954979 is a deficient number, since it is larger than the sum of its proper divisors (1).

7971261954979 is an equidigital number, since it uses as much as digits as its factorization.

7971261954979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540101520, while the sum is 76.

The spelling of 7971261954979 in words is "seven trillion, nine hundred seventy-one billion, two hundred sixty-one million, nine hundred fifty-four thousand, nine hundred seventy-nine".