11997511369 has 8 divisors (see below), whose sum is σ = 12015812160. Its totient is φ = 11979226896.

The previous prime is 11997511349. The next prime is 11997511387. The reversal of 11997511369 is 96311579911.

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

It is a cyclic number.

It is not a de Polignac number, because 11997511369 - 2⁹ = 11997510857 is a prime.

It is a super-2 number, since 2×11997511369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11997511349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2417839 + ... + 2422795.

It is an arithmetic number, because the mean of its divisors is an integer number (1501976520).

Almost surely, 2^11997511369 is an apocalyptic number.

It is an amenable number.

11997511369 is a deficient number, since it is larger than the sum of its proper divisors (18300791).

11997511369 is a wasteful number, since it uses less digits than its factorization.

11997511369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8159.

The product of its digits is 459270, while the sum is 52.

The spelling of 11997511369 in words is "eleven billion, nine hundred ninety-seven million, five hundred eleven thousand, three hundred sixty-nine".