181861297045 has 16 divisors (see below), whose sum is σ = 229360279680. Its totient is φ = 138162239424.

The previous prime is 181861297021. The next prime is 181861297081. The reversal of 181861297045 is 540792168181.

It is not a de Polignac number, because 181861297045 - 2¹⁷ = 181861165973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181861296983 and 181861297001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5672514 + ... + 5704483.

It is an arithmetic number, because the mean of its divisors is an integer number (14335017480).

Almost surely, 2^181861297045 is an apocalyptic number.

It is an amenable number.

181861297045 is a deficient number, since it is larger than the sum of its proper divisors (47498982635).

181861297045 is a wasteful number, since it uses less digits than its factorization.

181861297045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11377164.

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 181861297045 in words is "one hundred eighty-one billion, eight hundred sixty-one million, two hundred ninety-seven thousand, forty-five".