135669013578 has 24 divisors (see below), whose sum is σ = 335942319648. Its totient is φ = 38762575272.

The previous prime is 135669013573. The next prime is 135669013681. The reversal of 135669013578 is 875310966531.

135669013578 is a `hidden beast` number, since 1 + 3 + 5 + 6 + 69 + 0 + 1 + 3 + 578 = 666.

It is not an unprimeable number, because it can be changed into a prime (135669013573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 538368976 + ... + 538369227.

It is an arithmetic number, because the mean of its divisors is an integer number (13997596652).

Almost surely, 2^135669013578 is an apocalyptic number.

135669013578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

135669013578 is an abundant number, since it is smaller than the sum of its proper divisors (200273306070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135669013578 is a wasteful number, since it uses less digits than its factorization.

135669013578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076738218 (or 1076738215 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 135669013578 in words is "one hundred thirty-five billion, six hundred sixty-nine million, thirteen thousand, five hundred seventy-eight".