81035761028 has 24 divisors (see below), whose sum is σ = 142341239040. Its totient is φ = 40366969920.

The previous prime is 81035761021. The next prime is 81035761061. The reversal of 81035761028 is 82016753018.

It is not an unprimeable number, because it can be changed into a prime (81035761021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2583125 + ... + 2614307.

It is an arithmetic number, because the mean of its divisors is an integer number (5930884960).

Almost surely, 2^81035761028 is an apocalyptic number.

It is an amenable number.

81035761028 is a deficient number, since it is larger than the sum of its proper divisors (61305478012).

81035761028 is a wasteful number, since it uses less digits than its factorization.

81035761028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33587 (or 33585 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 81035761028 in words is "eighty-one billion, thirty-five million, seven hundred sixty-one thousand, twenty-eight".