81412023623 has 8 divisors (see below), whose sum is σ = 97087630848. Its totient is φ = 66747745944.

The previous prime is 81412023617. The next prime is 81412023697. The reversal of 81412023623 is 32632021418.

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 81412023623 - 2²⁸ = 81143588167 is a prime.

It is a super-2 number, since 2×81412023623² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81412023623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81412023523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252832211 + ... + 252832532.

It is an arithmetic number, because the mean of its divisors is an integer number (12135953856).

Almost surely, 2^81412023623 is an apocalyptic number.

81412023623 is a deficient number, since it is larger than the sum of its proper divisors (15675607225).

81412023623 is a wasteful number, since it uses less digits than its factorization.

81412023623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505664773.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 81412023623 in words is "eighty-one billion, four hundred twelve million, twenty-three thousand, six hundred twenty-three".