11719578049 has 9 divisors (see below), whose sum is σ = 12140889033. Its totient is φ = 11312423472.

The previous prime is 11719578023. The next prime is 11719578067. The reversal of 11719578049 is 94087591711.

It is a happy number.

The square root of 11719578049 is 108257.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 62489025 + 11657089024 = 7905^2 + 107968^2 .

It is not a de Polignac number, because 11719578049 - 2²⁵ = 11686023617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11719577987 and 11719578005.

It is not an unprimeable number, because it can be changed into a prime (11719578149) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3137587 + ... + 3141319.

Almost surely, 2^11719578049 is an apocalyptic number.

11719578049 is the 108257-th square number.

11719578049 is the 54129-th centered octagonal number.

It is an amenable number.

11719578049 is a deficient number, since it is larger than the sum of its proper divisors (421310984).

11719578049 is an frugal number, since it uses more digits than its factorization.

11719578049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524 (or 3762 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 52.

The spelling of 11719578049 in words is "eleven billion, seven hundred nineteen million, five hundred seventy-eight thousand, forty-nine".