1238561984911 has 8 divisors (see below), whose sum is σ = 1254279840320. Its totient is φ = 1222845126048.

The previous prime is 1238561984897. The next prime is 1238561984921. The reversal of 1238561984911 is 1194891658321.

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 1238561984911 - 2⁷ = 1238561984783 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 (1238561984921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2434585 + ... + 2899021.

It is an arithmetic number, because the mean of its divisors is an integer number (156784980040).

Almost surely, 2^{1238561984911} is an apocalyptic number.

1238561984911 is a deficient number, since it is larger than the sum of its proper divisors (15717855409).

1238561984911 is an equidigital number, since it uses as much as digits as its factorization.

1238561984911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498273.

The product of its digits is 3732480, while the sum is 58.

The spelling of 1238561984911 in words is "one trillion, two hundred thirty-eight billion, five hundred sixty-one million, nine hundred eighty-four thousand, nine hundred eleven".