81569250744234 has 16 divisors (see below), whose sum is σ = 177969274351200. Its totient is φ = 24717954770960.

The previous prime is 81569250744151. The next prime is 81569250744257. The reversal of 81569250744234 is 43244705296518.

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, 617948869209 + ... + 617948869340.

It is an arithmetic number, because the mean of its divisors is an integer number (11123079646950).

It is a 1-persistent number, because it is pandigital, but 2⋅81569250744234 = 163138501488468 is not.

Almost surely, 2^{81569250744234} is an apocalyptic number.

81569250744234 is an abundant number, since it is smaller than the sum of its proper divisors (96400023606966).

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

81569250744234 is a wasteful number, since it uses less digits than its factorization.

81569250744234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235897738565.

The product of its (nonzero) digits is 58060800, while the sum is 60.

The spelling of 81569250744234 in words is "eighty-one trillion, five hundred sixty-nine billion, two hundred fifty million, seven hundred forty-four thousand, two hundred thirty-four".