98644878385 has 16 divisors (see below), whose sum is σ = 125344948176. Its totient is φ = 74269093888.

The previous prime is 98644878359. The next prime is 98644878391. The reversal of 98644878385 is 58387844689.

It can be written as a sum of positive squares in 8 ways, for example, as 24193935936 + 74450942449 = 155544^2 + 272857^2 .

It is a cyclic number.

It is not a de Polignac number, because 98644878385 - 2¹³ = 98644870193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1934679 + ... + 1985011.

It is an arithmetic number, because the mean of its divisors is an integer number (7834059261).

Almost surely, 2^98644878385 is an apocalyptic number.

It is an amenable number.

98644878385 is a deficient number, since it is larger than the sum of its proper divisors (26700069791).

98644878385 is a wasteful number, since it uses less digits than its factorization.

98644878385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73412.

The product of its digits is 371589120, while the sum is 70.

The spelling of 98644878385 in words is "ninety-eight billion, six hundred forty-four million, eight hundred seventy-eight thousand, three hundred eighty-five".