98077900861 has 2 divisors, whose sum is σ = 98077900862. Its totient is φ = 98077900860.

The previous prime is 98077900847. The next prime is 98077900867. The reversal of 98077900861 is 16800977089.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97800678361 + 277222500 = 312731^2 + 16650^2 .

It is a cyclic number.

It is not a de Polignac number, because 98077900861 - 2¹¹ = 98077898813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98077900867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49038950430 + 49038950431.

It is an arithmetic number, because the mean of its divisors is an integer number (49038950431).

Almost surely, 2^98077900861 is an apocalyptic number.

It is an amenable number.

98077900861 is a deficient number, since it is larger than the sum of its proper divisors (1).

98077900861 is an equidigital number, since it uses as much as digits as its factorization.

98077900861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 98077900861 in words is "ninety-eight billion, seventy-seven million, nine hundred thousand, eight hundred sixty-one".