61173445679 has 2 divisors, whose sum is σ = 61173445680. Its totient is φ = 61173445678.

The previous prime is 61173445661. The next prime is 61173445681. The reversal of 61173445679 is 97654437116.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61173445679 - 2⁸ = 61173445423 is a prime.

Together with 61173445681, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61173445679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61173445699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30586722839 + 30586722840.

It is an arithmetic number, because the mean of its divisors is an integer number (30586722840).

Almost surely, 2^61173445679 is an apocalyptic number.

61173445679 is a deficient number, since it is larger than the sum of its proper divisors (1).

61173445679 is an equidigital number, since it uses as much as digits as its factorization.

61173445679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 53.

The spelling of 61173445679 in words is "sixty-one billion, one hundred seventy-three million, four hundred forty-five thousand, six hundred seventy-nine".