135209445137 has 8 divisors (see below), whose sum is σ = 145638721704. Its totient is φ = 124784247168.

The previous prime is 135209445127. The next prime is 135209445221. The reversal of 135209445137 is 731544902531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17833999936 + 117375445201 = 133544^2 + 342601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135209445137 - 2¹² = 135209441041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135209445127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950618 + ... + 1083555.

It is an arithmetic number, because the mean of its divisors is an integer number (18204840213).

Almost surely, 2^135209445137 is an apocalyptic number.

It is an amenable number.

135209445137 is a deficient number, since it is larger than the sum of its proper divisors (10429276567).

135209445137 is a wasteful number, since it uses less digits than its factorization.

135209445137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2039299.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 135209445137 in words is "one hundred thirty-five billion, two hundred nine million, four hundred forty-five thousand, one hundred thirty-seven".