81598888908 has 36 divisors (see below), whose sum is σ = 206276773248. Its totient is φ = 27197926560.

The previous prime is 81598888907. The next prime is 81598888909. The reversal of 81598888908 is 80988889518.

It is an interprime number because it is at equal distance from previous prime (81598888907) and next prime (81598888909).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (81598888907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 598485 + ... + 722067.

It is an arithmetic number, because the mean of its divisors is an integer number (5729910368).

Almost surely, 2^81598888908 is an apocalyptic number.

It is an amenable number.

81598888908 is an abundant number, since it is smaller than the sum of its proper divisors (124677884340).

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

81598888908 is a wasteful number, since it uses less digits than its factorization.

81598888908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141934 (or 141929 counting only the distinct ones).

The product of its (nonzero) digits is 106168320, while the sum is 72.

The spelling of 81598888908 in words is "eighty-one billion, five hundred ninety-eight million, eight hundred eighty-eight thousand, nine hundred eight".