118521987719 has 4 divisors (see below), whose sum is σ = 118523558400. Its totient is φ = 118520417040.

The previous prime is 118521987671. The next prime is 118521987751. The reversal of 118521987719 is 917789125811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 118521987719 - 2³² = 114227020423 is a prime.

It is a super-2 number, since 2×118521987719² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118521987119) 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, 666119 + ... + 825080.

It is an arithmetic number, because the mean of its divisors is an integer number (29630889600).

Almost surely, 2^118521987719 is an apocalyptic number.

118521987719 is a deficient number, since it is larger than the sum of its proper divisors (1570681).

118521987719 is an equidigital number, since it uses as much as digits as its factorization.

118521987719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570680.

The product of its digits is 2540160, while the sum is 59.

The spelling of 118521987719 in words is "one hundred eighteen billion, five hundred twenty-one million, nine hundred eighty-seven thousand, seven hundred nineteen".