81027425548 has 12 divisors (see below), whose sum is σ = 143259830392. Its totient is φ = 40096045440.

The previous prime is 81027425539. The next prime is 81027425573. The reversal of 81027425548 is 84552472018.

It is a junction number, because it is equal to n+sod(n) for n = 81027425498 and 81027425507.

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, 104416398 + ... + 104417173.

Almost surely, 2^81027425548 is an apocalyptic number.

It is an amenable number.

81027425548 is a deficient number, since it is larger than the sum of its proper divisors (62232404844).

81027425548 is a wasteful number, since it uses less digits than its factorization.

81027425548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208833672 (or 208833670 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 46.

The spelling of 81027425548 in words is "eighty-one billion, twenty-seven million, four hundred twenty-five thousand, five hundred forty-eight".