81008230554452 has 6 divisors (see below), whose sum is σ = 141764403470298. Its totient is φ = 40504115277224.

The previous prime is 81008230554439. The next prime is 81008230554473. The reversal of 81008230554452 is 25445503280018.

It can be written as a sum of positive squares in only one way, i.e., 69900368094736 + 11107862459716 = 8360644^2 + 3332846^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81008230554397 and 81008230554406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10126028819303 + ... + 10126028819310.

It is an arithmetic number, because the mean of its divisors is an integer number (23627400578383).

Almost surely, 2^{81008230554452} is an apocalyptic number.

It is an amenable number.

81008230554452 is a deficient number, since it is larger than the sum of its proper divisors (60756172915846).

81008230554452 is a wasteful number, since it uses less digits than its factorization.

81008230554452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20252057638617 (or 20252057638615 counting only the distinct ones).

The product of its (nonzero) digits is 1536000, while the sum is 47.

The spelling of 81008230554452 in words is "eighty-one trillion, eight billion, two hundred thirty million, five hundred fifty-four thousand, four hundred fifty-two".