81435048119 has 2 divisors, whose sum is σ = 81435048120. Its totient is φ = 81435048118.

The previous prime is 81435048109. The next prime is 81435048131. The reversal of 81435048119 is 91184053418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81435048119 - 2¹² = 81435044023 is a prime.

It is a super-2 number, since 2×81435048119² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 81435048119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81435048109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40717524059 + 40717524060.

It is an arithmetic number, because the mean of its divisors is an integer number (40717524060).

Almost surely, 2^81435048119 is an apocalyptic number.

81435048119 is a deficient number, since it is larger than the sum of its proper divisors (1).

81435048119 is an equidigital number, since it uses as much as digits as its factorization.

81435048119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 81435048119 in words is "eighty-one billion, four hundred thirty-five million, forty-eight thousand, one hundred nineteen".