135139640545 has 32 divisors (see below), whose sum is σ = 206473317120. Its totient is φ = 82589310720.

The previous prime is 135139640527. The next prime is 135139640563. The reversal of 135139640545 is 545046931531.

It is an interprime number because it is at equal distance from previous prime (135139640527) and next prime (135139640563).

It is not a de Polignac number, because 135139640545 - 2⁹ = 135139640033 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 135139640495 and 135139640504.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5107671 + ... + 5134060.

It is an arithmetic number, because the mean of its divisors is an integer number (6452291160).

Almost surely, 2^135139640545 is an apocalyptic number.

It is an amenable number.

135139640545 is a deficient number, since it is larger than the sum of its proper divisors (71333676575).

135139640545 is a wasteful number, since it uses less digits than its factorization.

135139640545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10241785.

The product of its (nonzero) digits is 972000, while the sum is 46.

The spelling of 135139640545 in words is "one hundred thirty-five billion, one hundred thirty-nine million, six hundred forty thousand, five hundred forty-five".