135556252973 has 2 divisors, whose sum is σ = 135556252974. Its totient is φ = 135556252972.

The previous prime is 135556252963. The next prime is 135556253051. The reversal of 135556252973 is 379252655531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100627259524 + 34928993449 = 317218^2 + 186893^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135556252973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135556252963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67778126486 + 67778126487.

It is an arithmetic number, because the mean of its divisors is an integer number (67778126487).

Almost surely, 2^135556252973 is an apocalyptic number.

It is an amenable number.

135556252973 is a deficient number, since it is larger than the sum of its proper divisors (1).

135556252973 is an equidigital number, since it uses as much as digits as its factorization.

135556252973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8505000, while the sum is 53.

The spelling of 135556252973 in words is "one hundred thirty-five billion, five hundred fifty-six million, two hundred fifty-two thousand, nine hundred seventy-three".