81034103385 has 24 divisors (see below), whose sum is σ = 144990054144. Its totient is φ = 41824052640.

The previous prime is 81034103377. The next prime is 81034103389. The reversal of 81034103385 is 58330143018.

It is not a de Polignac number, because 81034103385 - 2³ = 81034103377 is a prime.

It is a super-2 number, since 2×81034103385² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (81034103389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29043087 + ... + 29045876.

It is an arithmetic number, because the mean of its divisors is an integer number (6041252256).

Almost surely, 2^81034103385 is an apocalyptic number.

It is an amenable number.

81034103385 is a deficient number, since it is larger than the sum of its proper divisors (63955950759).

81034103385 is a wasteful number, since it uses less digits than its factorization.

81034103385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58089005 (or 58089002 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 81034103385 in words is "eighty-one billion, thirty-four million, one hundred three thousand, three hundred eighty-five".