155506923029 has 2 divisors, whose sum is σ = 155506923030. Its totient is φ = 155506923028.

The previous prime is 155506923001. The next prime is 155506923049. The reversal of 155506923029 is 920329605551.

It is a happy number.

155506923029 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89754168100 + 65752754929 = 299590^2 + 256423^2 .

It is a cyclic number.

It is not a de Polignac number, because 155506923029 - 2²⁴ = 155490145813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155506923049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77753461514 + 77753461515.

It is an arithmetic number, because the mean of its divisors is an integer number (77753461515).

Almost surely, 2^155506923029 is an apocalyptic number.

It is an amenable number.

155506923029 is a deficient number, since it is larger than the sum of its proper divisors (1).

155506923029 is an equidigital number, since it uses as much as digits as its factorization.

155506923029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729000, while the sum is 47.

The spelling of 155506923029 in words is "one hundred fifty-five billion, five hundred six million, nine hundred twenty-three thousand, twenty-nine".