11989538654 has 8 divisors (see below), whose sum is σ = 18279132888. Its totient is φ = 5896494360.

The previous prime is 11989538629. The next prime is 11989538657. The reversal of 11989538654 is 45683598911.

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

It is a junction number, because it is equal to n+sod(n) for n = 11989538593 and 11989538602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989538657) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 49137332 + ... + 49137575.

It is an arithmetic number, because the mean of its divisors is an integer number (2284891611).

Almost surely, 2^11989538654 is an apocalyptic number.

11989538654 is a deficient number, since it is larger than the sum of its proper divisors (6289594234).

11989538654 is an equidigital number, since it uses as much as digits as its factorization.

11989538654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98274970.

The product of its digits is 9331200, while the sum is 59.

The spelling of 11989538654 in words is "eleven billion, nine hundred eighty-nine million, five hundred thirty-eight thousand, six hundred fifty-four".