81803526036 has 24 divisors (see below), whose sum is σ = 190897260960. Its totient is φ = 27264646752.

The previous prime is 81803526029. The next prime is 81803526037. The reversal of 81803526036 is 63062530818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81803526037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291571 + ... + 498618.

It is an arithmetic number, because the mean of its divisors is an integer number (7954052540).

Almost surely, 2^81803526036 is an apocalyptic number.

It is an amenable number.

81803526036 is an abundant number, since it is smaller than the sum of its proper divisors (109093734924).

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

81803526036 is a wasteful number, since it uses less digits than its factorization.

81803526036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798823 (or 798821 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 81803526036 in words is "eighty-one billion, eight hundred three million, five hundred twenty-six thousand, thirty-six".