81467501804 has 24 divisors (see below), whose sum is σ = 153863721648. Its totient is φ = 37519859520.

The previous prime is 81467501803. The next prime is 81467501827. The reversal of 81467501804 is 40810576418.

It is not an unprimeable number, because it can be changed into a prime (81467501803) 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, 1653107 + ... + 1701674.

It is an arithmetic number, because the mean of its divisors is an integer number (6410988402).

Almost surely, 2^81467501804 is an apocalyptic number.

It is an amenable number.

81467501804 is a deficient number, since it is larger than the sum of its proper divisors (72396219844).

81467501804 is a wasteful number, since it uses less digits than its factorization.

81467501804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355265 (or 3355263 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 81467501804 in words is "eighty-one billion, four hundred sixty-seven million, five hundred one thousand, eight hundred four".