81025456864360 has 32 divisors (see below), whose sum is σ = 185028282099360. Its totient is φ = 31926448673856.

The previous prime is 81025456864343. The next prime is 81025456864463. The reversal of 81025456864360 is 6346865452018.

It is a junction number, because it is equal to n+sod(n) for n = 81025456864295 and 81025456864304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15116687034 + ... + 15116692393.

It is an arithmetic number, because the mean of its divisors is an integer number (5782133815605).

Almost surely, 2^{81025456864360} is an apocalyptic number.

It is an amenable number.

81025456864360 is an abundant number, since it is smaller than the sum of its proper divisors (104002825235000).

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

81025456864360 is a wasteful number, since it uses less digits than its factorization.

81025456864360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30233379505 (or 30233379501 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 58.

The spelling of 81025456864360 in words is "eighty-one trillion, twenty-five billion, four hundred fifty-six million, eight hundred sixty-four thousand, three hundred sixty".