81452022073 has 16 divisors (see below), whose sum is σ = 85730918400. Its totient is φ = 77283415440.

The previous prime is 81452022061. The next prime is 81452022079. The reversal of 81452022073 is 37022025418.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 81452022073 - 2⁹ = 81452021561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81452022079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634440 + ... + 751942.

It is an arithmetic number, because the mean of its divisors is an integer number (5358182400).

Almost surely, 2^81452022073 is an apocalyptic number.

It is an amenable number.

81452022073 is a deficient number, since it is larger than the sum of its proper divisors (4278896327).

81452022073 is a wasteful number, since it uses less digits than its factorization.

81452022073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117972.

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 81452022073 in words is "eighty-one billion, four hundred fifty-two million, twenty-two thousand, seventy-three".