81793432151 has 2 divisors, whose sum is σ = 81793432152. Its totient is φ = 81793432150.

The previous prime is 81793432129. The next prime is 81793432153. The reversal of 81793432151 is 15123439718.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81793432151 - 2¹⁰ = 81793431127 is a prime.

Together with 81793432153, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81793432153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40896716075 + 40896716076.

It is an arithmetic number, because the mean of its divisors is an integer number (40896716076).

Almost surely, 2^81793432151 is an apocalyptic number.

81793432151 is a deficient number, since it is larger than the sum of its proper divisors (1).

81793432151 is an equidigital number, since it uses as much as digits as its factorization.

81793432151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 44.

The spelling of 81793432151 in words is "eighty-one billion, seven hundred ninety-three million, four hundred thirty-two thousand, one hundred fifty-one".