81259469088 has 72 divisors (see below), whose sum is σ = 248131607472. Its totient is φ = 23216989824.

The previous prime is 81259469087. The next prime is 81259469117. The reversal of 81259469088 is 88096495218.

It is not an unprimeable number, because it can be changed into a prime (81259469087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8632570 + ... + 8641977.

It is an arithmetic number, because the mean of its divisors is an integer number (3446272326).

Almost surely, 2^81259469088 is an apocalyptic number.

It is an amenable number.

81259469088 is an abundant number, since it is smaller than the sum of its proper divisors (166872138384).

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

81259469088 is a wasteful number, since it uses less digits than its factorization.

81259469088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17274574 (or 17274559 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 60.

The spelling of 81259469088 in words is "eighty-one billion, two hundred fifty-nine million, four hundred sixty-nine thousand, eighty-eight".