1138240706978 has 8 divisors (see below), whose sum is σ = 1707600846060. Its totient is φ = 569040424960.

The previous prime is 1138240706971. The next prime is 1138240707011. The reversal of 1138240706978 is 8796070428311.

It can be written as a sum of positive squares in 2 ways, for example, as 1088218253329 + 50022453649 = 1043177^2 + 223657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1138240706971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39946463 + ... + 39974946.

Almost surely, 2^{1138240706978} is an apocalyptic number.

1138240706978 is a deficient number, since it is larger than the sum of its proper divisors (569360139082).

1138240706978 is an equidigital number, since it uses as much as digits as its factorization.

1138240706978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79928532.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 1138240706978 in words is "one trillion, one hundred thirty-eight billion, two hundred forty million, seven hundred six thousand, nine hundred seventy-eight".