81011003804 has 12 divisors (see below), whose sum is σ = 142357512528. Its totient is φ = 40337428800.

The previous prime is 81011003791. The next prime is 81011003837. The reversal of 81011003804 is 40830011018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42017192 + ... + 42019119.

It is an arithmetic number, because the mean of its divisors is an integer number (11863126044).

Almost surely, 2^81011003804 is an apocalyptic number.

It is an amenable number.

81011003804 is a deficient number, since it is larger than the sum of its proper divisors (61346508724).

81011003804 is a wasteful number, since it uses less digits than its factorization.

81011003804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84036556 (or 84036554 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The spelling of 81011003804 in words is "eighty-one billion, eleven million, three thousand, eight hundred four".