61168498613 has 2 divisors, whose sum is σ = 61168498614. Its totient is φ = 61168498612.

The previous prime is 61168498583. The next prime is 61168498619. The reversal of 61168498613 is 31689486116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56831222449 + 4337276164 = 238393^2 + 65858^2 .

It is a cyclic number.

It is not a de Polignac number, because 61168498613 - 2⁶ = 61168498549 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61168498619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30584249306 + 30584249307.

It is an arithmetic number, because the mean of its divisors is an integer number (30584249307).

Almost surely, 2^61168498613 is an apocalyptic number.

It is an amenable number.

61168498613 is a deficient number, since it is larger than the sum of its proper divisors (1).

61168498613 is an equidigital number, since it uses as much as digits as its factorization.

61168498613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 53.

The spelling of 61168498613 in words is "sixty-one billion, one hundred sixty-eight million, four hundred ninety-eight thousand, six hundred thirteen".