87389756485109 has 4 divisors (see below), whose sum is σ = 94112045445516. Its totient is φ = 80667467524704.

The previous prime is 87389756485099. The next prime is 87389756485159. The reversal of 87389756485109 is 90158465798378.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16016828422609 + 71372928062500 = 4002103^2 + 8448250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87389756485109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87389756485159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3361144480184 + ... + 3361144480209.

It is an arithmetic number, because the mean of its divisors is an integer number (23528011361379).

Almost surely, 2^{87389756485109} is an apocalyptic number.

It is an amenable number.

87389756485109 is a deficient number, since it is larger than the sum of its proper divisors (6722288960407).

87389756485109 is a wasteful number, since it uses less digits than its factorization.

87389756485109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6722288960406.

The product of its (nonzero) digits is 3657830400, while the sum is 80.

The spelling of 87389756485109 in words is "eighty-seven trillion, three hundred eighty-nine billion, seven hundred fifty-six million, four hundred eighty-five thousand, one hundred nine".