81037085312575 has 24 divisors (see below), whose sum is σ = 114883363819520. Its totient is φ = 55547849714400.

The previous prime is 81037085312569. The next prime is 81037085312641. The reversal of 81037085312575 is 57521358073018.

It is not a de Polignac number, because 81037085312575 - 2⁵ = 81037085312543 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84678471 + ... + 85630120.

Almost surely, 2^{81037085312575} is an apocalyptic number.

81037085312575 is a deficient number, since it is larger than the sum of its proper divisors (33846278506945).

81037085312575 is a wasteful number, since it uses less digits than its factorization.

81037085312575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170311327 (or 170311322 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 55.

The spelling of 81037085312575 in words is "eighty-one trillion, thirty-seven billion, eighty-five million, three hundred twelve thousand, five hundred seventy-five".