1138739451242 has 16 divisors (see below), whose sum is σ = 1711796197320. Its totient is φ = 568141152768.

The previous prime is 1138739451233. The next prime is 1138739451257. The reversal of 1138739451242 is 2421549378311.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1111086754561 + 27652696681 = 1054081^2 + 166291^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5286758 + ... + 5497934.

Almost surely, 2^{1138739451242} is an apocalyptic number.

1138739451242 is a deficient number, since it is larger than the sum of its proper divisors (573056746078).

1138739451242 is a wasteful number, since it uses less digits than its factorization.

1138739451242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216985.

The product of its digits is 1451520, while the sum is 50.

The spelling of 1138739451242 in words is "one trillion, one hundred thirty-eight billion, seven hundred thirty-nine million, four hundred fifty-one thousand, two hundred forty-two".