181273132057 has 2 divisors, whose sum is σ = 181273132058. Its totient is φ = 181273132056.

The previous prime is 181273132049. The next prime is 181273132069. The reversal of 181273132057 is 750231372181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123428552976 + 57844579081 = 351324^2 + 240509^2 .

It is a cyclic number.

It is not a de Polignac number, because 181273132057 - 2³ = 181273132049 is a prime.

It is a super-2 number, since 2×181273132057² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (181273132357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90636566028 + 90636566029.

It is an arithmetic number, because the mean of its divisors is an integer number (90636566029).

Almost surely, 2^181273132057 is an apocalyptic number.

It is an amenable number.

181273132057 is a deficient number, since it is larger than the sum of its proper divisors (1).

181273132057 is an equidigital number, since it uses as much as digits as its factorization.

181273132057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 40.

The spelling of 181273132057 in words is "one hundred eighty-one billion, two hundred seventy-three million, one hundred thirty-two thousand, fifty-seven".