1205605500157 has 2 divisors, whose sum is σ = 1205605500158. Its totient is φ = 1205605500156.

The previous prime is 1205605500107. The next prime is 1205605500163. The reversal of 1205605500157 is 7510055065021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1164109365721 + 41496134436 = 1078939^2 + 203706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205605500157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205605500107) 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, 602802750078 + 602802750079.

It is an arithmetic number, because the mean of its divisors is an integer number (602802750079).

Almost surely, 2^{1205605500157} is an apocalyptic number.

It is an amenable number.

1205605500157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205605500157 is an equidigital number, since it uses as much as digits as its factorization.

1205605500157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 1205605500157 in words is "one trillion, two hundred five billion, six hundred five million, five hundred thousand, one hundred fifty-seven".