81623851127 has 16 divisors (see below), whose sum is σ = 100652267520. Its totient is φ = 64457988192.

The previous prime is 81623851109. The next prime is 81623851201. The reversal of 81623851127 is 72115832618.

It is not a de Polignac number, because 81623851127 - 2⁶ = 81623851063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81623851427) 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, 809927 + ... + 905112.

It is an arithmetic number, because the mean of its divisors is an integer number (6290766720).

Almost surely, 2^81623851127 is an apocalyptic number.

81623851127 is a deficient number, since it is larger than the sum of its proper divisors (19028416393).

81623851127 is a wasteful number, since it uses less digits than its factorization.

81623851127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715582.

The product of its digits is 161280, while the sum is 44.

The spelling of 81623851127 in words is "eighty-one billion, six hundred twenty-three million, eight hundred fifty-one thousand, one hundred twenty-seven".