81548532088 has 16 divisors (see below), whose sum is σ = 153209925000. Its totient is φ = 40692552096.

The previous prime is 81548532071. The next prime is 81548532101. The reversal of 81548532088 is 88023584518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10210003 + ... + 10217986.

Almost surely, 2^81548532088 is an apocalyptic number.

It is an amenable number.

81548532088 is a deficient number, since it is larger than the sum of its proper divisors (71661392912).

81548532088 is a wasteful number, since it uses less digits than its factorization.

81548532088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20428494 (or 20428490 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 52.

The spelling of 81548532088 in words is "eighty-one billion, five hundred forty-eight million, five hundred thirty-two thousand, eighty-eight".