11956469519 has 4 divisors (see below), whose sum is σ = 11956783296. Its totient is φ = 11956155744.

The previous prime is 11956469513. The next prime is 11956469561. The reversal of 11956469519 is 91596465911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91596465911 = 97 ⋅944293463.

It is a cyclic number.

It is not a de Polignac number, because 11956469519 - 2²⁰ = 11955420943 is a prime.

It is a super-2 number, since 2×11956469519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11956469513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90314 + ... + 179079.

It is an arithmetic number, because the mean of its divisors is an integer number (2989195824).

Almost surely, 2^11956469519 is an apocalyptic number.

11956469519 is a deficient number, since it is larger than the sum of its proper divisors (313777).

11956469519 is an equidigital number, since it uses as much as digits as its factorization.

11956469519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313776.

The product of its digits is 2624400, while the sum is 56.

The spelling of 11956469519 in words is "eleven billion, nine hundred fifty-six million, four hundred sixty-nine thousand, five hundred nineteen".