155350122409 has 4 divisors (see below), whose sum is σ = 159548774404. Its totient is φ = 151151470416.

The previous prime is 155350122353. The next prime is 155350122439. The reversal of 155350122409 is 904221053551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53826320025 + 101523802384 = 232005^2 + 318628^2 .

It is a cyclic number.

It is not a de Polignac number, because 155350122409 - 2⁹ = 155350121897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 4198651957 = 155350122409 / (1 + 5 + 5 + 3 + 5 + 0 + 1 + 2 + 2 + 4 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155350122439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099325942 + ... + 2099326015.

It is an arithmetic number, because the mean of its divisors is an integer number (39887193601).

Almost surely, 2^155350122409 is an apocalyptic number.

It is an amenable number.

155350122409 is a deficient number, since it is larger than the sum of its proper divisors (4198651995).

155350122409 is an equidigital number, since it uses as much as digits as its factorization.

155350122409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198651994.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 155350122409 in words is "one hundred fifty-five billion, three hundred fifty million, one hundred twenty-two thousand, four hundred nine".