11870261987 has 4 divisors (see below), whose sum is σ = 12253173696. Its totient is φ = 11487350280.

The previous prime is 11870261983. The next prime is 11870261993. The reversal of 11870261987 is 78916207811.

11870261987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11870261987 - 2² = 11870261983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11870261983) 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, 191455808 + ... + 191455869.

It is an arithmetic number, because the mean of its divisors is an integer number (3063293424).

Almost surely, 2^11870261987 is an apocalyptic number.

11870261987 is a deficient number, since it is larger than the sum of its proper divisors (382911709).

11870261987 is an equidigital number, since it uses as much as digits as its factorization.

11870261987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382911708.

The product of its (nonzero) digits is 338688, while the sum is 50.

The spelling of 11870261987 in words is "eleven billion, eight hundred seventy million, two hundred sixty-one thousand, nine hundred eighty-seven".