98771403644777 has 2 divisors, whose sum is σ = 98771403644778. Its totient is φ = 98771403644776.

The previous prime is 98771403644723. The next prime is 98771403644873. The reversal of 98771403644777 is 77744630417789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83312698401241 + 15458705243536 = 9127579^2 + 3931756^2 .

It is a cyclic number.

It is not a de Polignac number, because 98771403644777 - 2²⁰ = 98771402596201 is a prime.

It is not a weakly prime, because it can be changed into another prime (98771403644707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49385701822388 + 49385701822389.

It is an arithmetic number, because the mean of its divisors is an integer number (49385701822389).

Almost surely, 2^{98771403644777} is an apocalyptic number.

It is an amenable number.

98771403644777 is a deficient number, since it is larger than the sum of its proper divisors (1).

98771403644777 is an equidigital number, since it uses as much as digits as its factorization.

98771403644777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1394039808, while the sum is 74.

The spelling of 98771403644777 in words is "ninety-eight trillion, seven hundred seventy-one billion, four hundred three million, six hundred forty-four thousand, seven hundred seventy-seven".