155242144114991 has 2 divisors, whose sum is σ = 155242144114992. Its totient is φ = 155242144114990.

The previous prime is 155242144114987. The next prime is 155242144115153. The reversal of 155242144114991 is 199411441242551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155242144114991 - 2² = 155242144114987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155242144114901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77621072057495 + 77621072057496.

It is an arithmetic number, because the mean of its divisors is an integer number (77621072057496).

Almost surely, 2^{155242144114991} is an apocalyptic number.

155242144114991 is a deficient number, since it is larger than the sum of its proper divisors (1).

155242144114991 is an equidigital number, since it uses as much as digits as its factorization.

155242144114991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2073600, while the sum is 53.

The spelling of 155242144114991 in words is "one hundred fifty-five trillion, two hundred forty-two billion, one hundred forty-four million, one hundred fourteen thousand, nine hundred ninety-one".