81673262041 has 32 divisors (see below), whose sum is σ = 100680842240. Its totient is φ = 64687097664.

The previous prime is 81673262029. The next prime is 81673262071. The reversal of 81673262041 is 14026237618.

It is not a de Polignac number, because 81673262041 - 2⁵ = 81673262009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81673261985 and 81673262003.

It is not an unprimeable number, because it can be changed into a prime (81673262071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4182286 + ... + 4201768.

It is an arithmetic number, because the mean of its divisors is an integer number (3146276320).

Almost surely, 2^81673262041 is an apocalyptic number.

It is an amenable number.

81673262041 is a deficient number, since it is larger than the sum of its proper divisors (19007580199).

81673262041 is a wasteful number, since it uses less digits than its factorization.

81673262041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20285.

The product of its (nonzero) digits is 96768, while the sum is 40.

Adding to 81673262041 its reverse (14026237618), we get a palindrome (95699499659).

The spelling of 81673262041 in words is "eighty-one billion, six hundred seventy-three million, two hundred sixty-two thousand, forty-one".