98018863691 has 4 divisors (see below), whose sum is σ = 112021558512. Its totient is φ = 84016168872.

The previous prime is 98018863667. The next prime is 98018863771. The reversal of 98018863691 is 19636881089.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19636881089 = 7 ⋅2805268727.

It is a cyclic number.

It is not a de Polignac number, because 98018863691 - 2⁶ = 98018863627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 98018863691.

It is not an unprimeable number, because it can be changed into a prime (98018863291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7001347400 + ... + 7001347413.

It is an arithmetic number, because the mean of its divisors is an integer number (28005389628).

Almost surely, 2^98018863691 is an apocalyptic number.

98018863691 is a deficient number, since it is larger than the sum of its proper divisors (14002694821).

98018863691 is a wasteful number, since it uses less digits than its factorization.

98018863691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14002694820.

The product of its (nonzero) digits is 4478976, while the sum is 59.

The spelling of 98018863691 in words is "ninety-eight billion, eighteen million, eight hundred sixty-three thousand, six hundred ninety-one".