81184751845004 has 24 divisors (see below), whose sum is σ = 148252461247968. Its totient is φ = 38826954460800.

The previous prime is 81184751844899. The next prime is 81184751845009. The reversal of 81184751845004 is 40054815748118.

It is not an unprimeable number, because it can be changed into a prime (81184751845009) 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, 660854 + ... + 12759554.

It is an arithmetic number, because the mean of its divisors is an integer number (6177185885332).

Almost surely, 2^{81184751845004} is an apocalyptic number.

It is an amenable number.

81184751845004 is a deficient number, since it is larger than the sum of its proper divisors (67067709402964).

81184751845004 is a wasteful number, since it uses less digits than its factorization.

81184751845004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12171665 (or 12171663 counting only the distinct ones).

The product of its (nonzero) digits is 5734400, while the sum is 56.

The spelling of 81184751845004 in words is "eighty-one trillion, one hundred eighty-four billion, seven hundred fifty-one million, eight hundred forty-five thousand, four".