135120563437 has 2 divisors, whose sum is σ = 135120563438. Its totient is φ = 135120563436.

The previous prime is 135120563393. The next prime is 135120563447. The reversal of 135120563437 is 734365021531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127155714921 + 7964848516 = 356589^2 + 89246^2 .

It is a cyclic number.

It is not a de Polignac number, because 135120563437 - 2⁷ = 135120563309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135120563437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135120563447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67560281718 + 67560281719.

It is an arithmetic number, because the mean of its divisors is an integer number (67560281719).

Almost surely, 2^135120563437 is an apocalyptic number.

It is an amenable number.

135120563437 is a deficient number, since it is larger than the sum of its proper divisors (1).

135120563437 is an equidigital number, since it uses as much as digits as its factorization.

135120563437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 40.

Adding to 135120563437 its reverse (734365021531), we get a palindrome (869485584968).

The spelling of 135120563437 in words is "one hundred thirty-five billion, one hundred twenty million, five hundred sixty-three thousand, four hundred thirty-seven".