11886490215 has 48 divisors (see below), whose sum is σ = 21104946720. Its totient is φ = 6185410560.

The previous prime is 11886490207. The next prime is 11886490261. The reversal of 11886490215 is 51209468811.

It is a happy number.

It is not a de Polignac number, because 11886490215 - 2³ = 11886490207 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2181895 + ... + 2187335.

It is an arithmetic number, because the mean of its divisors is an integer number (439686390).

Almost surely, 2^11886490215 is an apocalyptic number.

11886490215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11886490215 is a deficient number, since it is larger than the sum of its proper divisors (9218456505).

11886490215 is a wasteful number, since it uses less digits than its factorization.

11886490215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624 (or 6621 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 11886490215 in words is "eleven billion, eight hundred eighty-six million, four hundred ninety thousand, two hundred fifteen".