181452197721400 has 24 divisors (see below), whose sum is σ = 421876359702720. Its totient is φ = 72580879088480.

The previous prime is 181452197721367. The next prime is 181452197721439. The reversal of 181452197721400 is 4127791254181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 453630494104 + ... + 453630494503.

It is an arithmetic number, because the mean of its divisors is an integer number (17578181654280).

Almost surely, 2^{181452197721400} is an apocalyptic number.

181452197721400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181452197721400 is an abundant number, since it is smaller than the sum of its proper divisors (240424161981320).

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

181452197721400 is a wasteful number, since it uses less digits than its factorization.

181452197721400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907260988623 (or 907260988614 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 52.

The spelling of 181452197721400 in words is "one hundred eighty-one trillion, four hundred fifty-two billion, one hundred ninety-seven million, seven hundred twenty-one thousand, four hundred".