135561144623 has 2 divisors, whose sum is σ = 135561144624. Its totient is φ = 135561144622.

The previous prime is 135561144599. The next prime is 135561144671. The reversal of 135561144623 is 326441165531.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135561144623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135561140623) 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, 67780572311 + 67780572312.

It is an arithmetic number, because the mean of its divisors is an integer number (67780572312).

Almost surely, 2^135561144623 is an apocalyptic number.

135561144623 is a deficient number, since it is larger than the sum of its proper divisors (1).

135561144623 is an equidigital number, since it uses as much as digits as its factorization.

135561144623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 41.

The spelling of 135561144623 in words is "one hundred thirty-five billion, five hundred sixty-one million, one hundred forty-four thousand, six hundred twenty-three".