181868123051 has 16 divisors (see below), whose sum is σ = 186362985600. Its totient is φ = 177400258560.

The previous prime is 181868122967. The next prime is 181868123053. The reversal of 181868123051 is 150321868181.

It is a cyclic number.

It is not a de Polignac number, because 181868123051 - 2³⁰ = 180794381227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181868122993 and 181868123011.

It is not an unprimeable number, because it can be changed into a prime (181868123053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20613221 + ... + 20622041.

It is an arithmetic number, because the mean of its divisors is an integer number (11647686600).

Almost surely, 2^181868123051 is an apocalyptic number.

181868123051 is a deficient number, since it is larger than the sum of its proper divisors (4494862549).

181868123051 is an equidigital number, since it uses as much as digits as its factorization.

181868123051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10294.

The product of its (nonzero) digits is 92160, while the sum is 44.

The spelling of 181868123051 in words is "one hundred eighty-one billion, eight hundred sixty-eight million, one hundred twenty-three thousand, fifty-one".