155621168041 has 2 divisors, whose sum is σ = 155621168042. Its totient is φ = 155621168040.

The previous prime is 155621168023. The next prime is 155621168047. The reversal of 155621168041 is 140861126551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99416612416 + 56204555625 = 315304^2 + 237075^2 .

It is a cyclic number.

It is not a de Polignac number, because 155621168041 - 2¹¹ = 155621165993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155621167985 and 155621168003.

It is not a weakly prime, because it can be changed into another prime (155621168047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77810584020 + 77810584021.

It is an arithmetic number, because the mean of its divisors is an integer number (77810584021).

Almost surely, 2^155621168041 is an apocalyptic number.

It is an amenable number.

155621168041 is a deficient number, since it is larger than the sum of its proper divisors (1).

155621168041 is an equidigital number, since it uses as much as digits as its factorization.

155621168041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 40.

The spelling of 155621168041 in words is "one hundred fifty-five billion, six hundred twenty-one million, one hundred sixty-eight thousand, forty-one".