181551010057 has 2 divisors, whose sum is σ = 181551010058. Its totient is φ = 181551010056.

The previous prime is 181551010051. The next prime is 181551010127. The reversal of 181551010057 is 750010155181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175737862521 + 5813147536 = 419211^2 + 76244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181551010057 is a prime.

It is not a weakly prime, because it can be changed into another prime (181551010051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90775505028 + 90775505029.

It is an arithmetic number, because the mean of its divisors is an integer number (90775505029).

Almost surely, 2^181551010057 is an apocalyptic number.

It is an amenable number.

181551010057 is a deficient number, since it is larger than the sum of its proper divisors (1).

181551010057 is an equidigital number, since it uses as much as digits as its factorization.

181551010057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7000, while the sum is 34.

The spelling of 181551010057 in words is "one hundred eighty-one billion, five hundred fifty-one million, ten thousand, fifty-seven".