98115618645557 has 2 divisors, whose sum is σ = 98115618645558. Its totient is φ = 98115618645556.

The previous prime is 98115618645511. The next prime is 98115618645587. The reversal of 98115618645557 is 75554681651189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70167997169956 + 27947621475601 = 8376634^2 + 5286551^2 .

It is a cyclic number.

It is not a de Polignac number, because 98115618645557 - 2¹² = 98115618641461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98115618645587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49057809322778 + 49057809322779.

It is an arithmetic number, because the mean of its divisors is an integer number (49057809322779).

Almost surely, 2^{98115618645557} is an apocalyptic number.

It is an amenable number.

98115618645557 is a deficient number, since it is larger than the sum of its proper divisors (1).

98115618645557 is an equidigital number, since it uses as much as digits as its factorization.

98115618645557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880000, while the sum is 71.

The spelling of 98115618645557 in words is "ninety-eight trillion, one hundred fifteen billion, six hundred eighteen million, six hundred forty-five thousand, five hundred fifty-seven".