155661436311127 has 2 divisors, whose sum is σ = 155661436311128. Its totient is φ = 155661436311126.

The previous prime is 155661436311109. The next prime is 155661436311133. The reversal of 155661436311127 is 721113634166551.

155661436311127 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155661436311127 - 2¹⁹ = 155661435786839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155661436311137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77830718155563 + 77830718155564.

It is an arithmetic number, because the mean of its divisors is an integer number (77830718155564).

Almost surely, 2^{155661436311127} is an apocalyptic number.

155661436311127 is a deficient number, since it is larger than the sum of its proper divisors (1).

155661436311127 is an equidigital number, since it uses as much as digits as its factorization.

155661436311127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2721600, while the sum is 52.

The spelling of 155661436311127 in words is "one hundred fifty-five trillion, six hundred sixty-one billion, four hundred thirty-six million, three hundred eleven thousand, one hundred twenty-seven".