98871257981 has 6 divisors (see below), whose sum is σ = 103356911070. Its totient is φ = 94572507128.

The previous prime is 98871257941. The next prime is 98871258029. The reversal of 98871257981 is 18975217889.

It can be written as a sum of positive squares in only one way, i.e., 84759005956 + 14112252025 = 291134^2 + 118795^2 .

It is not a de Polignac number, because 98871257981 - 2¹⁴ = 98871241597 is a prime.

It is a super-2 number, since 2×98871257981² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98871257941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93450566 + ... + 93451623.

It is an arithmetic number, because the mean of its divisors is an integer number (17226151845).

Almost surely, 2^98871257981 is an apocalyptic number.

It is an amenable number.

98871257981 is a deficient number, since it is larger than the sum of its proper divisors (4485653089).

98871257981 is a wasteful number, since it uses less digits than its factorization.

98871257981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186902235 (or 186902212 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 65.

The spelling of 98871257981 in words is "ninety-eight billion, eight hundred seventy-one million, two hundred fifty-seven thousand, nine hundred eighty-one".