98191665018 has 56 divisors (see below), whose sum is σ = 221001976800. Its totient is φ = 32705099784.

The previous prime is 98191664993. The next prime is 98191665043. The reversal of 98191665018 is 81056619189.

It is an interprime number because it is at equal distance from previous prime (98191664993) and next prime (98191665043).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1897573 + ... + 1948631.

Almost surely, 2^98191665018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 98191665018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110500988400).

98191665018 is an abundant number, since it is smaller than the sum of its proper divisors (122810311782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

98191665018 is a wasteful number, since it uses less digits than its factorization.

98191665018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52398 (or 52383 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The spelling of 98191665018 in words is "ninety-eight billion, one hundred ninety-one million, six hundred sixty-five thousand, eighteen".