81038017347 has 16 divisors (see below), whose sum is σ = 123490547712. Its totient is φ = 46305921600.

The previous prime is 81038017343. The next prime is 81038017381. The reversal of 81038017347 is 74371083018.

It is a happy number.

It is not a de Polignac number, because 81038017347 - 2² = 81038017343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81038017299 and 81038017308.

It is not an unprimeable number, because it can be changed into a prime (81038017343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1045143 + ... + 1119999.

It is an arithmetic number, because the mean of its divisors is an integer number (7718159232).

Almost surely, 2^81038017347 is an apocalyptic number.

81038017347 is a deficient number, since it is larger than the sum of its proper divisors (42452530365).

81038017347 is a wasteful number, since it uses less digits than its factorization.

81038017347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126418.

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 81038017347 in words is "eighty-one billion, thirty-eight million, seventeen thousand, three hundred forty-seven".