155340204109 has 2 divisors, whose sum is σ = 155340204110. Its totient is φ = 155340204108.

The previous prime is 155340204079. The next prime is 155340204179. The reversal of 155340204109 is 901402043551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134868890025 + 20471314084 = 367245^2 + 143078^2 .

It is an emirp because it is prime and its reverse (901402043551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155340204109 - 2¹⁹ = 155339679821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155340204179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77670102054 + 77670102055.

It is an arithmetic number, because the mean of its divisors is an integer number (77670102055).

Almost surely, 2^155340204109 is an apocalyptic number.

It is an amenable number.

155340204109 is a deficient number, since it is larger than the sum of its proper divisors (1).

155340204109 is an equidigital number, since it uses as much as digits as its factorization.

155340204109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 155340204109 in words is "one hundred fifty-five billion, three hundred forty million, two hundred four thousand, one hundred nine".