81025366284 has 30 divisors (see below), whose sum is σ = 211816313324. Its totient is φ = 27008455320.

The previous prime is 81025366193. The next prime is 81025366333. The reversal of 81025366284 is 48266352018.

81025366284 is a `hidden beast` number, since 8 + 1 + 0 + 2 + 5 + 366 + 284 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 125038822 + ... + 125039469.

Almost surely, 2^81025366284 is an apocalyptic number.

It is an amenable number.

81025366284 is an abundant number, since it is smaller than the sum of its proper divisors (130790947040).

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

81025366284 is a wasteful number, since it uses less digits than its factorization.

81025366284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250078307 (or 250078296 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 81025366284 in words is "eighty-one billion, twenty-five million, three hundred sixty-six thousand, two hundred eighty-four".