11915957387 has 8 divisors (see below), whose sum is σ = 12225085152. Its totient is φ = 11607710400.

The previous prime is 11915957381. The next prime is 11915957393. The reversal of 11915957387 is 78375951911.

It is a happy number.

11915957387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11915957381) and next prime (11915957393).

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 11915957387 - 2⁴ = 11915957371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11915957381) 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 7 ways as a sum of consecutive naturals, for example, 192743 + ... + 246944.

It is an arithmetic number, because the mean of its divisors is an integer number (1528135644).

Almost surely, 2^11915957387 is an apocalyptic number.

11915957387 is a deficient number, since it is larger than the sum of its proper divisors (309127765).

11915957387 is an equidigital number, since it uses as much as digits as its factorization.

11915957387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440389.

The product of its digits is 2381400, while the sum is 56.

The spelling of 11915957387 in words is "eleven billion, nine hundred fifteen million, nine hundred fifty-seven thousand, three hundred eighty-seven".