155105661119 has 2 divisors, whose sum is σ = 155105661120. Its totient is φ = 155105661118.

The previous prime is 155105661107. The next prime is 155105661127. The reversal of 155105661119 is 911166501551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155105661119 - 2⁸ = 155105660863 is a prime.

It is a super-2 number, since 2×155105661119² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155105661619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77552830559 + 77552830560.

It is an arithmetic number, because the mean of its divisors is an integer number (77552830560).

Almost surely, 2^155105661119 is an apocalyptic number.

155105661119 is a deficient number, since it is larger than the sum of its proper divisors (1).

155105661119 is an equidigital number, since it uses as much as digits as its factorization.

155105661119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40500, while the sum is 41.

The spelling of 155105661119 in words is "one hundred fifty-five billion, one hundred five million, six hundred sixty-one thousand, one hundred nineteen".