1555156661119 has 2 divisors, whose sum is σ = 1555156661120. Its totient is φ = 1555156661118.

The previous prime is 1555156661099. The next prime is 1555156661159. The reversal of 1555156661119 is 9111666515551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1555156661119 - 2²⁵ = 1555123106687 is a prime.

It is a super-2 number, since 2×1555156661119² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1555156661159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777578330559 + 777578330560.

It is an arithmetic number, because the mean of its divisors is an integer number (777578330560).

Almost surely, 2^{1555156661119} is an apocalyptic number.

1555156661119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555156661119 is an equidigital number, since it uses as much as digits as its factorization.

1555156661119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1215000, while the sum is 52.

The spelling of 1555156661119 in words is "one trillion, five hundred fifty-five billion, one hundred fifty-six million, six hundred sixty-one thousand, one hundred nineteen".