11915555387 has 8 divisors (see below), whose sum is σ = 11952708000. Its totient is φ = 11878461504.

The previous prime is 11915555383. The next prime is 11915555401. The reversal of 11915555387 is 78355551911.

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 11915555387 - 2² = 11915555383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11915555381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410663 + ... + 438719.

It is an arithmetic number, because the mean of its divisors is an integer number (1494088500).

Almost surely, 2^11915555387 is an apocalyptic number.

11915555387 is a deficient number, since it is larger than the sum of its proper divisors (37152613).

11915555387 is an equidigital number, since it uses as much as digits as its factorization.

11915555387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29365.

The product of its digits is 945000, while the sum is 50.

The spelling of 11915555387 in words is "eleven billion, nine hundred fifteen million, five hundred fifty-five thousand, three hundred eighty-seven".