1138887523991 has 8 divisors (see below), whose sum is σ = 1305691692960. Its totient is φ = 973109842848.

The previous prime is 1138887523979. The next prime is 1138887523993. The reversal of 1138887523991 is 1993257888311.

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

It is a cyclic number.

It is not a de Polignac number, because 1138887523991 - 2⁶ = 1138887523927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138887523993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256619576 + ... + 256624013.

It is an arithmetic number, because the mean of its divisors is an integer number (163211461620).

Almost surely, 2^{1138887523991} is an apocalyptic number.

1138887523991 is a deficient number, since it is larger than the sum of its proper divisors (166804168969).

1138887523991 is an equidigital number, since it uses as much as digits as its factorization.

1138887523991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513243913.

The product of its digits is 26127360, while the sum is 65.

The spelling of 1138887523991 in words is "one trillion, one hundred thirty-eight billion, eight hundred eighty-seven million, five hundred twenty-three thousand, nine hundred ninety-one".