81038343407 has 12 divisors (see below), whose sum is σ = 94279153680. Its totient is φ = 69454024416.

The previous prime is 81038343311. The next prime is 81038343427. The reversal of 81038343407 is 70434383018.

It is not a de Polignac number, because 81038343407 - 2¹⁰ = 81038342383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81038343427) 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 in 11 ways as a sum of consecutive naturals, for example, 403238 + ... + 569804.

It is an arithmetic number, because the mean of its divisors is an integer number (7856596140).

Almost surely, 2^81038343407 is an apocalyptic number.

81038343407 is a deficient number, since it is larger than the sum of its proper divisors (13240810273).

81038343407 is a wasteful number, since it uses less digits than its factorization.

81038343407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176510 (or 176503 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 81038343407 in words is "eighty-one billion, thirty-eight million, three hundred forty-three thousand, four hundred seven".