81593236103 has 2 divisors, whose sum is σ = 81593236104. Its totient is φ = 81593236102.

The previous prime is 81593236003. The next prime is 81593236133. The reversal of 81593236103 is 30163239518.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81593236103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81593236133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40796618051 + 40796618052.

It is an arithmetic number, because the mean of its divisors is an integer number (40796618052).

Almost surely, 2^81593236103 is an apocalyptic number.

81593236103 is a deficient number, since it is larger than the sum of its proper divisors (1).

81593236103 is an equidigital number, since it uses as much as digits as its factorization.

81593236103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 81593236103 in words is "eighty-one billion, five hundred ninety-three million, two hundred thirty-six thousand, one hundred three".