11866198390 has 48 divisors (see below), whose sum is σ = 22747226400. Its totient is φ = 4455908352.

The previous prime is 11866198361. The next prime is 11866198411. The reversal of 11866198390 is 9389166811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1176991 + ... + 1187029.

It is an arithmetic number, because the mean of its divisors is an integer number (473900550).

Almost surely, 2^11866198390 is an apocalyptic number.

11866198390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11866198390 is a deficient number, since it is larger than the sum of its proper divisors (10881028010).

11866198390 is a wasteful number, since it uses less digits than its factorization.

11866198390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10489 (or 10472 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 11866198390 in words is "eleven billion, eight hundred sixty-six million, one hundred ninety-eight thousand, three hundred ninety".