181005552835091 has 2 divisors, whose sum is σ = 181005552835092. Its totient is φ = 181005552835090.

The previous prime is 181005552835049. The next prime is 181005552835139. The reversal of 181005552835091 is 190538255500181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 181005552835091 - 2¹⁴ = 181005552818707 is a prime.

It is not a weakly prime, because it can be changed into another prime (181005552835021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90502776417545 + 90502776417546.

It is an arithmetic number, because the mean of its divisors is an integer number (90502776417546).

Almost surely, 2^{181005552835091} is an apocalyptic number.

181005552835091 is a deficient number, since it is larger than the sum of its proper divisors (1).

181005552835091 is an equidigital number, since it uses as much as digits as its factorization.

181005552835091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160000, while the sum is 53.

The spelling of 181005552835091 in words is "one hundred eighty-one trillion, five billion, five hundred fifty-two million, eight hundred thirty-five thousand, ninety-one".