135620361025 has 12 divisors (see below), whose sum is σ = 168423684604. Its totient is φ = 108332136000.

The previous prime is 135620361007. The next prime is 135620361043. The reversal of 135620361025 is 520163026531.

It is an interprime number because it is at equal distance from previous prime (135620361007) and next prime (135620361043).

It can be written as a sum of positive squares in 6 ways, for example, as 13771521 + 135606589504 = 3711^2 + 368248^2 .

It is not a de Polignac number, because 135620361025 - 2²⁷ = 135486143297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4086966 + ... + 4120015.

Almost surely, 2^135620361025 is an apocalyptic number.

It is an amenable number.

135620361025 is a deficient number, since it is larger than the sum of its proper divisors (32803323579).

135620361025 is an equidigital number, since it uses as much as digits as its factorization.

135620361025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8207652 (or 8207647 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

Adding to 135620361025 its reverse (520163026531), we get a palindrome (655783387556).

The spelling of 135620361025 in words is "one hundred thirty-five billion, six hundred twenty million, three hundred sixty-one thousand, twenty-five".