11951959087 has 4 divisors (see below), whose sum is σ = 11957928120. Its totient is φ = 11945990056.

The previous prime is 11951959007. The next prime is 11951959147. The reversal of 11951959087 is 78095915911.

It is a happy number.

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 11951959087 - 2¹⁵ = 11951926319 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 (11951959007) 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, 2981512 + ... + 2985517.

It is an arithmetic number, because the mean of its divisors is an integer number (2989482030).

Almost surely, 2^11951959087 is an apocalyptic number.

11951959087 is a deficient number, since it is larger than the sum of its proper divisors (5969033).

11951959087 is an equidigital number, since it uses as much as digits as its factorization.

11951959087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5969032.

The product of its (nonzero) digits is 1020600, while the sum is 55.

The spelling of 11951959087 in words is "eleven billion, nine hundred fifty-one million, nine hundred fifty-nine thousand, eighty-seven".