11854497989 has 4 divisors (see below), whose sum is σ = 11858216160. Its totient is φ = 11850779820.

The previous prime is 11854497983. The next prime is 11854498001. The reversal of 11854497989 is 98979445811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11854497989 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 (11854497983) 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, 1854299 + ... + 1860680.

It is an arithmetic number, because the mean of its divisors is an integer number (2964554040).

Almost surely, 2^11854497989 is an apocalyptic number.

It is an amenable number.

11854497989 is a deficient number, since it is larger than the sum of its proper divisors (3718171).

11854497989 is an equidigital number, since it uses as much as digits as its factorization.

11854497989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718170.

The product of its digits is 26127360, while the sum is 65.

The spelling of 11854497989 in words is "eleven billion, eight hundred fifty-four million, four hundred ninety-seven thousand, nine hundred eighty-nine".