155111327051777 has 2 divisors, whose sum is σ = 155111327051778. Its totient is φ = 155111327051776.

The previous prime is 155111327051519. The next prime is 155111327051887. The reversal of 155111327051777 is 777150723111551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154919245582336 + 192081469441 = 12446656^2 + 438271^2 .

It is a cyclic number.

It is not a de Polignac number, because 155111327051777 - 2⁴⁴ = 137519141007361 is a prime.

It is not a weakly prime, because it can be changed into another prime (155111327051477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77555663525888 + 77555663525889.

It is an arithmetic number, because the mean of its divisors is an integer number (77555663525889).

Almost surely, 2^{155111327051777} is an apocalyptic number.

It is an amenable number.

155111327051777 is a deficient number, since it is larger than the sum of its proper divisors (1).

155111327051777 is an equidigital number, since it uses as much as digits as its factorization.

155111327051777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800750, while the sum is 53.

The spelling of 155111327051777 in words is "one hundred fifty-five trillion, one hundred eleven billion, three hundred twenty-seven million, fifty-one thousand, seven hundred seventy-seven".