81238927023 has 32 divisors (see below), whose sum is σ = 123236352000. Its totient is φ = 52868243808.

The previous prime is 81238927001. The next prime is 81238927051. The reversal of 81238927023 is 32072983218.

It is not a de Polignac number, because 81238927023 - 2⁵ = 81238926991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81238927023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81238927073) 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, 402453 + ... + 569601.

It is an arithmetic number, because the mean of its divisors is an integer number (3851136000).

Almost surely, 2^81238927023 is an apocalyptic number.

81238927023 is a deficient number, since it is larger than the sum of its proper divisors (41997424977).

81238927023 is a wasteful number, since it uses less digits than its factorization.

81238927023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167588 (or 167582 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 81238927023 in words is "eighty-one billion, two hundred thirty-eight million, nine hundred twenty-seven thousand, twenty-three".