135638322979 has 16 divisors (see below), whose sum is σ = 140748491520. Its totient is φ = 130557601440.

The previous prime is 135638322907. The next prime is 135638322983. The reversal of 135638322979 is 979223836531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135638322979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135638322179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15403792 + ... + 15412594.

It is an arithmetic number, because the mean of its divisors is an integer number (8796780720).

Almost surely, 2^135638322979 is an apocalyptic number.

135638322979 is a deficient number, since it is larger than the sum of its proper divisors (5110168541).

135638322979 is a wasteful number, since it uses less digits than its factorization.

135638322979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10410.

The product of its digits is 14696640, while the sum is 58.

The spelling of 135638322979 in words is "one hundred thirty-five billion, six hundred thirty-eight million, three hundred twenty-two thousand, nine hundred seventy-nine".