181810826969142 has 64 divisors (see below), whose sum is σ = 416810188408320. Its totient is φ = 51790853523456.

The previous prime is 181810826969129. The next prime is 181810826969197. The reversal of 181810826969142 is 241969628018181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14607909 + ... + 24021087.

It is an arithmetic number, because the mean of its divisors is an integer number (6512659193880).

Almost surely, 2^{181810826969142} is an apocalyptic number.

181810826969142 is an abundant number, since it is smaller than the sum of its proper divisors (234999361439178).

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

181810826969142 is a wasteful number, since it uses less digits than its factorization.

181810826969142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9414565.

The product of its (nonzero) digits is 23887872, while the sum is 66.

The spelling of 181810826969142 in words is "one hundred eighty-one trillion, eight hundred ten billion, eight hundred twenty-six million, nine hundred sixty-nine thousand, one hundred forty-two".