181142093800 has 24 divisors (see below), whose sum is σ = 421155368550. Its totient is φ = 72456837440.

The previous prime is 181142093791. The next prime is 181142093831. The reversal of 181142093800 is 8390241181.

It can be written as a sum of positive squares in 3 ways, for example, as 177454932516 + 3687161284 = 421254^2 + 60722^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 181142093800.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 452855035 + ... + 452855434.

Almost surely, 2^181142093800 is an apocalyptic number.

181142093800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181142093800 is an abundant number, since it is smaller than the sum of its proper divisors (240013274750).

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

181142093800 is a wasteful number, since it uses less digits than its factorization.

181142093800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905710485 (or 905710476 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 181142093800 in words is "one hundred eighty-one billion, one hundred forty-two million, ninety-three thousand, eight hundred".