11987454417 has 8 divisors (see below), whose sum is σ = 16373108640. Its totient is φ = 7796718240.

The previous prime is 11987454397. The next prime is 11987454431. The reversal of 11987454417 is 71445478911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-11987454417 is a prime.

It is a super-3 number, since 3×11987454417³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11987454417.

It is not an unprimeable number, because it can be changed into a prime (11987454497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48729367 + ... + 48729612.

It is an arithmetic number, because the mean of its divisors is an integer number (2046638580).

Almost surely, 2^11987454417 is an apocalyptic number.

It is an amenable number.

11987454417 is a deficient number, since it is larger than the sum of its proper divisors (4385654223).

11987454417 is an equidigital number, since it uses as much as digits as its factorization.

11987454417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97459023.

The product of its digits is 1128960, while the sum is 51.

The spelling of 11987454417 in words is "eleven billion, nine hundred eighty-seven million, four hundred fifty-four thousand, four hundred seventeen".