135879666978530 has 32 divisors (see below), whose sum is σ = 244699953039360. Its totient is φ = 54325971786240.

The previous prime is 135879666978509. The next prime is 135879666978557. The reversal of 135879666978530 is 35879666978531.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198386117 + ... + 199069863.

It is an arithmetic number, because the mean of its divisors is an integer number (7646873532480).

Almost surely, 2^{135879666978530} is an apocalyptic number.

135879666978530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135879666978530 is a deficient number, since it is larger than the sum of its proper divisors (108820286060830).

135879666978530 is a wasteful number, since it uses less digits than its factorization.

135879666978530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693194.

The product of its (nonzero) digits is 12345177600, while the sum is 83.

Subtracting from 135879666978530 its reverse (35879666978531), we obtain a palindrome (99999999999999).

The spelling of 135879666978530 in words is "one hundred thirty-five trillion, eight hundred seventy-nine billion, six hundred sixty-six million, nine hundred seventy-eight thousand, five hundred thirty".