81593236003 has 2 divisors, whose sum is σ = 81593236004. Its totient is φ = 81593236002.

The previous prime is 81593235967. The next prime is 81593236103. The reversal of 81593236003 is 30063239518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81593236003 - 2⁹ = 81593235491 is a prime.

It is a super-2 number, since 2×81593236003² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (81593236103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40796618001 + 40796618002.

It is an arithmetic number, because the mean of its divisors is an integer number (40796618002).

Almost surely, 2^81593236003 is an apocalyptic number.

81593236003 is a deficient number, since it is larger than the sum of its proper divisors (1).

81593236003 is an equidigital number, since it uses as much as digits as its factorization.

81593236003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The spelling of 81593236003 in words is "eighty-one billion, five hundred ninety-three million, two hundred thirty-six thousand, three".