81080835558 has 48 divisors (see below), whose sum is σ = 169747361616. Its totient is φ = 25800128640.

The previous prime is 81080835541. The next prime is 81080835599. The reversal of 81080835558 is 85553808018.

It is a super-3 number, since 3×81080835558³ (a number of 34 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 81080835558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 558588 + ... + 688608.

It is an arithmetic number, because the mean of its divisors is an integer number (3536403367).

Almost surely, 2^81080835558 is an apocalyptic number.

81080835558 is an abundant number, since it is smaller than the sum of its proper divisors (88666526058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81080835558 is a wasteful number, since it uses less digits than its factorization.

81080835558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130169 (or 130116 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 51.

The spelling of 81080835558 in words is "eighty-one billion, eighty million, eight hundred thirty-five thousand, five hundred fifty-eight".