155027361509 has 2 divisors, whose sum is σ = 155027361510. Its totient is φ = 155027361508.

The previous prime is 155027361491. The next prime is 155027361529. The reversal of 155027361509 is 905163720551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150505202500 + 4522159009 = 387950^2 + 67247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155027361509 is a prime.

It is a super-3 number, since 3×155027361509³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155027361509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155027361529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77513680754 + 77513680755.

It is an arithmetic number, because the mean of its divisors is an integer number (77513680755).

Almost surely, 2^155027361509 is an apocalyptic number.

It is an amenable number.

155027361509 is a deficient number, since it is larger than the sum of its proper divisors (1).

155027361509 is an equidigital number, since it uses as much as digits as its factorization.

155027361509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 283500, while the sum is 44.

The spelling of 155027361509 in words is "one hundred fifty-five billion, twenty-seven million, three hundred sixty-one thousand, five hundred nine".