81148765882 has 32 divisors (see below), whose sum is σ = 128595600000. Its totient is φ = 38299355136.

The previous prime is 81148765837. The next prime is 81148765891. The reversal of 81148765882 is 28856784118.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13800219 + ... + 13806097.

It is an arithmetic number, because the mean of its divisors is an integer number (4018612500).

Almost surely, 2^81148765882 is an apocalyptic number.

81148765882 is a deficient number, since it is larger than the sum of its proper divisors (47446834118).

81148765882 is a wasteful number, since it uses less digits than its factorization.

81148765882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158.

The product of its digits is 6881280, while the sum is 58.

The spelling of 81148765882 in words is "eighty-one billion, one hundred forty-eight million, seven hundred sixty-five thousand, eight hundred eighty-two".