81027395736 has 32 divisors (see below), whose sum is σ = 231506845440. Its totient is φ = 23150684448.

The previous prime is 81027395719. The next prime is 81027395747. The reversal of 81027395736 is 63759372018.

It is a congruent number.

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, 241152796 + ... + 241153131.

It is an arithmetic number, because the mean of its divisors is an integer number (7234588920).

Almost surely, 2^81027395736 is an apocalyptic number.

It is an amenable number.

81027395736 is an abundant number, since it is smaller than the sum of its proper divisors (150479449704).

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

81027395736 is a wasteful number, since it uses less digits than its factorization.

81027395736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482305943 (or 482305939 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 81027395736 in words is "eighty-one billion, twenty-seven million, three hundred ninety-five thousand, seven hundred thirty-six".