81028900230845 has 8 divisors (see below), whose sum is σ = 111125348888064. Its totient is φ = 55562674443984.

The previous prime is 81028900230829. The next prime is 81028900230919. The reversal of 81028900230845 is 54803200982018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81028900230845 - 2⁴ = 81028900230829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81028900230793 and 81028900230802.

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, 1157555717549 + ... + 1157555717618.

It is an arithmetic number, because the mean of its divisors is an integer number (13890668611008).

Almost surely, 2^{81028900230845} is an apocalyptic number.

It is an amenable number.

81028900230845 is a deficient number, since it is larger than the sum of its proper divisors (30096448657219).

81028900230845 is a wasteful number, since it uses less digits than its factorization.

81028900230845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315111435179.

The product of its (nonzero) digits is 1105920, while the sum is 50.

The spelling of 81028900230845 in words is "eighty-one trillion, twenty-eight billion, nine hundred million, two hundred thirty thousand, eight hundred forty-five".