155143346323561 has 2 divisors, whose sum is σ = 155143346323562. Its totient is φ = 155143346323560.

The previous prime is 155143346323519. The next prime is 155143346323571. The reversal of 155143346323561 is 165323643341551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144789334728336 + 10354011595225 = 12032844^2 + 3217765^2 .

It is a cyclic number.

It is not a de Polignac number, because 155143346323561 - 2¹³ = 155143346315369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155143346323499 and 155143346323508.

It is not a weakly prime, because it can be changed into another prime (155143346323571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77571673161780 + 77571673161781.

It is an arithmetic number, because the mean of its divisors is an integer number (77571673161781).

Almost surely, 2^{155143346323561} is an apocalyptic number.

It is an amenable number.

155143346323561 is a deficient number, since it is larger than the sum of its proper divisors (1).

155143346323561 is an equidigital number, since it uses as much as digits as its factorization.

155143346323561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664000, while the sum is 52.

The spelling of 155143346323561 in words is "one hundred fifty-five trillion, one hundred forty-three billion, three hundred forty-six million, three hundred twenty-three thousand, five hundred sixty-one".