79340159846021 has 2 divisors, whose sum is σ = 79340159846022. Its totient is φ = 79340159846020.

The previous prime is 79340159845993. The next prime is 79340159846041. The reversal of 79340159846021 is 12064895104397.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66301120502500 + 13039039343521 = 8142550^2 + 3610961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79340159846021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79340159846041) 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 as a sum of consecutive naturals, namely, 39670079923010 + 39670079923011.

It is an arithmetic number, because the mean of its divisors is an integer number (39670079923011).

It is a 1-persistent number, because it is pandigital, but 2⋅79340159846021 = 158680319692042 is not.

Almost surely, 2^{79340159846021} is an apocalyptic number.

It is an amenable number.

79340159846021 is a deficient number, since it is larger than the sum of its proper divisors (1).

79340159846021 is an equidigital number, since it uses as much as digits as its factorization.

79340159846021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 79340159846021 in words is "seventy-nine trillion, three hundred forty billion, one hundred fifty-nine million, eight hundred forty-six thousand, twenty-one".