155601262409 has 2 divisors, whose sum is σ = 155601262410. Its totient is φ = 155601262408.

The previous prime is 155601262393. The next prime is 155601262469. The reversal of 155601262409 is 904262106551.

155601262409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109807402384 + 45793860025 = 331372^2 + 213995^2 .

It is a cyclic number.

It is not a de Polignac number, because 155601262409 - 2⁴ = 155601262393 is a prime.

It is not a weakly prime, because it can be changed into another prime (155601262469) 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, 77800631204 + 77800631205.

It is an arithmetic number, because the mean of its divisors is an integer number (77800631205).

Almost surely, 2^155601262409 is an apocalyptic number.

It is an amenable number.

155601262409 is a deficient number, since it is larger than the sum of its proper divisors (1).

155601262409 is an equidigital number, since it uses as much as digits as its factorization.

155601262409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 155601262409 in words is "one hundred fifty-five billion, six hundred one million, two hundred sixty-two thousand, four hundred nine".