81807115526286 has 16 divisors (see below), whose sum is σ = 165115279045200. Its totient is φ = 27018863843328.

The previous prime is 81807115526249. The next prime is 81807115526309. The reversal of 81807115526286 is 68262551170818.

It is a super-2 number, since 2×81807115526286² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62543665651 + ... + 62543666958.

It is an arithmetic number, because the mean of its divisors is an integer number (10319704940325).

Almost surely, 2^{81807115526286} is an apocalyptic number.

81807115526286 is an abundant number, since it is smaller than the sum of its proper divisors (83308163518914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81807115526286 is a wasteful number, since it uses less digits than its factorization.

81807115526286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125087332723.

The product of its (nonzero) digits is 12902400, while the sum is 60.

The spelling of 81807115526286 in words is "eighty-one trillion, eight hundred seven billion, one hundred fifteen million, five hundred twenty-six thousand, two hundred eighty-six".