9771720098 has 16 divisors (see below), whose sum is σ = 16851832704. Its totient is φ = 4162801920.

The previous prime is 9771720097. The next prime is 9771720169. The reversal of 9771720098 is 8900271779.

It is not an unprimeable number, because it can be changed into a prime (9771720097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2087423 + ... + 2092098.

It is an arithmetic number, because the mean of its divisors is an integer number (1053239544).

Almost surely, 2^9771720098 is an apocalyptic number.

9771720098 is a deficient number, since it is larger than the sum of its proper divisors (7080112606).

9771720098 is a wasteful number, since it uses less digits than its factorization.

9771720098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179697.

The product of its (nonzero) digits is 444528, while the sum is 50.

The square root of 9771720098 is about 98852.0110973975. The cubic root of 9771720098 is about 2137.9145329564.

The spelling of 9771720098 in words is "nine billion, seven hundred seventy-one million, seven hundred twenty thousand, ninety-eight".