81240092488 has 16 divisors (see below), whose sum is σ = 152764156080. Its totient is φ = 40502984208.

The previous prime is 81240092419. The next prime is 81240092489. The reversal of 81240092488 is 88429004218.

It is not an unprimeable number, because it can be changed into a prime (81240092489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14629806 + ... + 14635357.

It is an arithmetic number, because the mean of its divisors is an integer number (9547759755).

Almost surely, 2^81240092488 is an apocalyptic number.

It is an amenable number.

81240092488 is a deficient number, since it is larger than the sum of its proper divisors (71524063592).

81240092488 is a wasteful number, since it uses less digits than its factorization.

81240092488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29265516 (or 29265512 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 46.

The spelling of 81240092488 in words is "eighty-one billion, two hundred forty million, ninety-two thousand, four hundred eighty-eight".