81010005305285 has 32 divisors (see below), whose sum is σ = 113850500908032. Its totient is φ = 54182253047040.

The previous prime is 81010005305267. The next prime is 81010005305303. The reversal of 81010005305285 is 58250350001018.

It is an interprime number because it is at equal distance from previous prime (81010005305267) and next prime (81010005305303).

It is not a de Polignac number, because 81010005305285 - 2³² = 81005710337989 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83555906 + ... + 84519875.

It is an arithmetic number, because the mean of its divisors is an integer number (3557828153376).

Almost surely, 2^{81010005305285} is an apocalyptic number.

It is an amenable number.

81010005305285 is a deficient number, since it is larger than the sum of its proper divisors (32840495602747).

81010005305285 is a wasteful number, since it uses less digits than its factorization.

81010005305285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168076133.

The product of its (nonzero) digits is 48000, while the sum is 38.

The spelling of 81010005305285 in words is "eighty-one trillion, ten billion, five million, three hundred five thousand, two hundred eighty-five".