155109945629 has 2 divisors, whose sum is σ = 155109945630. Its totient is φ = 155109945628.

The previous prime is 155109945581. The next prime is 155109945649. The reversal of 155109945629 is 926549901551.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92558935225 + 62551010404 = 304235^2 + 250102^2 .

It is an emirp because it is prime and its reverse (926549901551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155109945629 - 2¹² = 155109941533 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155109945649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77554972814 + 77554972815.

It is an arithmetic number, because the mean of its divisors is an integer number (77554972815).

Almost surely, 2^155109945629 is an apocalyptic number.

It is an amenable number.

155109945629 is a deficient number, since it is larger than the sum of its proper divisors (1).

155109945629 is an equidigital number, since it uses as much as digits as its factorization.

155109945629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374000, while the sum is 56.

The spelling of 155109945629 in words is "one hundred fifty-five billion, one hundred nine million, nine hundred forty-five thousand, six hundred twenty-nine".