81082154418 has 16 divisors (see below), whose sum is σ = 162168448896. Its totient is φ = 27026694800.

The previous prime is 81082154401. The next prime is 81082154429. The reversal of 81082154418 is 81445128018.

It is a self number, because there is not a number n which added to its sum of digits gives 81082154418.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120343 + ... + 420293.

It is an arithmetic number, because the mean of its divisors is an integer number (10135528056).

Almost surely, 2^81082154418 is an apocalyptic number.

81082154418 is an abundant number, since it is smaller than the sum of its proper divisors (81086294478).

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

81082154418 is a wasteful number, since it uses less digits than its factorization.

81082154418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345009.

The product of its (nonzero) digits is 81920, while the sum is 42.

The spelling of 81082154418 in words is "eighty-one billion, eighty-two million, one hundred fifty-four thousand, four hundred eighteen".