81196602931903 has 2 divisors, whose sum is σ = 81196602931904. Its totient is φ = 81196602931902.

The previous prime is 81196602931901. The next prime is 81196602932059. The reversal of 81196602931903 is 30913920669118.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81196602931903 - 2¹ = 81196602931901 is a prime.

It is a super-2 number, since 2×81196602931903² (a number of 29 digits) contains 22 as substring.

Together with 81196602931901, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81196602931901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40598301465951 + 40598301465952.

It is an arithmetic number, because the mean of its divisors is an integer number (40598301465952).

Almost surely, 2^{81196602931903} is an apocalyptic number.

81196602931903 is a deficient number, since it is larger than the sum of its proper divisors (1).

81196602931903 is an equidigital number, since it uses as much as digits as its factorization.

81196602931903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The spelling of 81196602931903 in words is "eighty-one trillion, one hundred ninety-six billion, six hundred two million, nine hundred thirty-one thousand, nine hundred three".