153438187843909 has 2 divisors, whose sum is σ = 153438187843910. Its totient is φ = 153438187843908.

The previous prime is 153438187843873. The next prime is 153438187843939. The reversal of 153438187843909 is 909348781834351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128500928430625 + 24937259413284 = 11335825^2 + 4993722^2 .

It is a cyclic number.

It is not a de Polignac number, because 153438187843909 - 2¹⁵ = 153438187811141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153438187843939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76719093921954 + 76719093921955.

It is an arithmetic number, because the mean of its divisors is an integer number (76719093921955).

Almost surely, 2^{153438187843909} is an apocalyptic number.

It is an amenable number.

153438187843909 is a deficient number, since it is larger than the sum of its proper divisors (1).

153438187843909 is an equidigital number, since it uses as much as digits as its factorization.

153438187843909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 627056640, while the sum is 73.

The spelling of 153438187843909 in words is "one hundred fifty-three trillion, four hundred thirty-eight billion, one hundred eighty-seven million, eight hundred forty-three thousand, nine hundred nine".