81028422460 has 12 divisors (see below), whose sum is σ = 170159687208. Its totient is φ = 32411368976.

The previous prime is 81028422421. The next prime is 81028422469. The reversal of 81028422460 is 6422482018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81028422469) 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, 2025710542 + ... + 2025710581.

It is an arithmetic number, because the mean of its divisors is an integer number (14179973934).

Almost surely, 2^81028422460 is an apocalyptic number.

It is an amenable number.

81028422460 is an abundant number, since it is smaller than the sum of its proper divisors (89131264748).

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

81028422460 is a wasteful number, since it uses less digits than its factorization.

81028422460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051421132 (or 4051421130 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 37.

The spelling of 81028422460 in words is "eighty-one billion, twenty-eight million, four hundred twenty-two thousand, four hundred sixty".