79946542619081 has 2 divisors, whose sum is σ = 79946542619082. Its totient is φ = 79946542619080.

The previous prime is 79946542618993. The next prime is 79946542619093. The reversal of 79946542619081 is 18091624564997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79934042261056 + 12500358025 = 8940584^2 + 111805^2 .

It is a cyclic number.

It is not a de Polignac number, because 79946542619081 - 2²² = 79946538424777 is a prime.

It is a super-2 number, since 2×79946542619081² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79946542618996 and 79946542619014.

It is not a weakly prime, because it can be changed into another prime (79946542619381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39973271309540 + 39973271309541.

It is an arithmetic number, because the mean of its divisors is an integer number (39973271309541).

Almost surely, 2^{79946542619081} is an apocalyptic number.

It is an amenable number.

79946542619081 is a deficient number, since it is larger than the sum of its proper divisors (1).

79946542619081 is an equidigital number, since it uses as much as digits as its factorization.

79946542619081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235146240, while the sum is 71.

The spelling of 79946542619081 in words is "seventy-nine trillion, nine hundred forty-six billion, five hundred forty-two million, six hundred nineteen thousand, eighty-one".