135630511565 has 4 divisors (see below), whose sum is σ = 162756613884. Its totient is φ = 108504409248.

The previous prime is 135630511547. The next prime is 135630511571. The reversal of 135630511565 is 565115036531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565115036531 = 227 ⋅2489493553.

It can be written as a sum of positive squares in 2 ways, for example, as 50692072201 + 84938439364 = 225149^2 + 291442^2 .

It is a cyclic number.

It is not a de Polignac number, because 135630511565 - 2¹² = 135630507469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13563051152 + ... + 13563051161.

It is an arithmetic number, because the mean of its divisors is an integer number (40689153471).

Almost surely, 2^135630511565 is an apocalyptic number.

It is an amenable number.

135630511565 is a deficient number, since it is larger than the sum of its proper divisors (27126102319).

135630511565 is an equidigital number, since it uses as much as digits as its factorization.

135630511565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27126102318.

The product of its (nonzero) digits is 202500, while the sum is 41.

The spelling of 135630511565 in words is "one hundred thirty-five billion, six hundred thirty million, five hundred eleven thousand, five hundred sixty-five".