181401327297904 has 40 divisors (see below), whose sum is σ = 401771555733600. Its totient is φ = 77724615376128.

The previous prime is 181401327297859. The next prime is 181401327297913. The reversal of 181401327297904 is 409792723104181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195478879 + ... + 196404670.

It is an arithmetic number, because the mean of its divisors is an integer number (10044288893340).

Almost surely, 2^{181401327297904} is an apocalyptic number.

181401327297904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

181401327297904 is an abundant number, since it is smaller than the sum of its proper divisors (220370228435696).

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

181401327297904 is a wasteful number, since it uses less digits than its factorization.

181401327297904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391887697 (or 391887691 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 58.

The spelling of 181401327297904 in words is "one hundred eighty-one trillion, four hundred one billion, three hundred twenty-seven million, two hundred ninety-seven thousand, nine hundred four".