11613821549 has 8 divisors (see below), whose sum is σ = 13220476992. Its totient is φ = 10098975040.

The previous prime is 11613821509. The next prime is 11613821561. The reversal of 11613821549 is 94512831611.

It is a happy number.

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

It is not a de Polignac number, because 11613821549 - 2¹⁶ = 11613756013 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 (11613821509) 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 7 ways as a sum of consecutive naturals, for example, 22951964 + ... + 22952469.

It is an arithmetic number, because the mean of its divisors is an integer number (1652559624).

Almost surely, 2^11613821549 is an apocalyptic number.

It is an amenable number.

11613821549 is a deficient number, since it is larger than the sum of its proper divisors (1606655443).

11613821549 is a wasteful number, since it uses less digits than its factorization.

11613821549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45904467.

The product of its digits is 51840, while the sum is 41.

The spelling of 11613821549 in words is "eleven billion, six hundred thirteen million, eight hundred twenty-one thousand, five hundred forty-nine".