81458022908 has 12 divisors (see below), whose sum is σ = 142653445200. Its totient is φ = 40699895712.

The previous prime is 81458022907. The next prime is 81458022913. The reversal of 81458022908 is 80922085418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81458022907) 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, 7272641 + ... + 7283832.

It is an arithmetic number, because the mean of its divisors is an integer number (11887787100).

Almost surely, 2^81458022908 is an apocalyptic number.

It is an amenable number.

81458022908 is a deficient number, since it is larger than the sum of its proper divisors (61195422292).

81458022908 is a wasteful number, since it uses less digits than its factorization.

81458022908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14557876 (or 14557874 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 47.

The spelling of 81458022908 in words is "eighty-one billion, four hundred fifty-eight million, twenty-two thousand, nine hundred eight".