81026107808 has 24 divisors (see below), whose sum is σ = 161010999072. Its totient is φ = 40134425536.

The previous prime is 81026107807. The next prime is 81026107837. The reversal of 81026107808 is 80870162018.

It is not an unprimeable number, because it can be changed into a prime (81026107807) 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, 11828660 + ... + 11835507.

It is an arithmetic number, because the mean of its divisors is an integer number (6708791628).

Almost surely, 2^81026107808 is an apocalyptic number.

It is an amenable number.

81026107808 is a deficient number, since it is larger than the sum of its proper divisors (79984891264).

81026107808 is a wasteful number, since it uses less digits than its factorization.

81026107808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23664284 (or 23664276 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 41.

The spelling of 81026107808 in words is "eighty-one billion, twenty-six million, one hundred seven thousand, eight hundred eight".