81496401043 has 2 divisors, whose sum is σ = 81496401044. Its totient is φ = 81496401042.

The previous prime is 81496401037. The next prime is 81496401067. The reversal of 81496401043 is 34010469418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81496401043 - 2¹³ = 81496392851 is a prime.

It is a super-2 number, since 2×81496401043² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81496400987 and 81496401005.

It is not a weakly prime, because it can be changed into another prime (81496401023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40748200521 + 40748200522.

It is an arithmetic number, because the mean of its divisors is an integer number (40748200522).

Almost surely, 2^81496401043 is an apocalyptic number.

81496401043 is a deficient number, since it is larger than the sum of its proper divisors (1).

81496401043 is an equidigital number, since it uses as much as digits as its factorization.

81496401043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 81496401043 in words is "eighty-one billion, four hundred ninety-six million, four hundred one thousand, forty-three".