81526801676860 has 48 divisors (see below), whose sum is σ = 181228784536800. Its totient is φ = 30753975538944.

The previous prime is 81526801676849. The next prime is 81526801676863. The reversal of 81526801676860 is 6867610862518.

It is a junction number, because it is equal to n+sod(n) for n = 81526801676792 and 81526801676801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81526801676863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1634433795 + ... + 1634483674.

It is an arithmetic number, because the mean of its divisors is an integer number (3775599677850).

Almost surely, 2^{81526801676860} is an apocalyptic number.

It is an amenable number.

81526801676860 is an abundant number, since it is smaller than the sum of its proper divisors (99701982859940).

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

81526801676860 is a wasteful number, since it uses less digits than its factorization.

81526801676860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268917550 (or 3268917548 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 81526801676860 in words is "eighty-one trillion, five hundred twenty-six billion, eight hundred one million, six hundred seventy-six thousand, eight hundred sixty".