81832114487 has 2 divisors, whose sum is σ = 81832114488. Its totient is φ = 81832114486.

The previous prime is 81832114477. The next prime is 81832114513. The reversal of 81832114487 is 78441123818.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81832114487 - 2¹⁰ = 81832113463 is a prime.

It is a super-2 number, since 2×81832114487² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81832114477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40916057243 + 40916057244.

It is an arithmetic number, because the mean of its divisors is an integer number (40916057244).

Almost surely, 2^81832114487 is an apocalyptic number.

81832114487 is a deficient number, since it is larger than the sum of its proper divisors (1).

81832114487 is an equidigital number, since it uses as much as digits as its factorization.

81832114487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 344064, while the sum is 47.

The spelling of 81832114487 in words is "eighty-one billion, eight hundred thirty-two million, one hundred fourteen thousand, four hundred eighty-seven".