135638322978 has 16 divisors (see below), whose sum is σ = 271280334240. Its totient is φ = 45212159616.

The previous prime is 135638322907. The next prime is 135638322983. The reversal of 135638322978 is 879223836531.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 638601 + ... + 824067.

It is an arithmetic number, because the mean of its divisors is an integer number (16955020890).

Almost surely, 2^135638322978 is an apocalyptic number.

135638322978 is an abundant number, since it is smaller than the sum of its proper divisors (135642011262).

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

135638322978 is a wasteful number, since it uses less digits than its factorization.

135638322978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307361.

The product of its digits is 13063680, while the sum is 57.

The spelling of 135638322978 in words is "one hundred thirty-five billion, six hundred thirty-eight million, three hundred twenty-two thousand, nine hundred seventy-eight".