11995409975 has 12 divisors (see below), whose sum is σ = 15237097680. Its totient is φ = 9362270400.

The previous prime is 11995409971. The next prime is 11995409977. The reversal of 11995409975 is 57990459911.

It is not a de Polignac number, because 11995409975 - 2² = 11995409971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11995409971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5850395 + ... + 5852444.

It is an arithmetic number, because the mean of its divisors is an integer number (1269758140).

Almost surely, 2^11995409975 is an apocalyptic number.

11995409975 is a deficient number, since it is larger than the sum of its proper divisors (3241687705).

11995409975 is a wasteful number, since it uses less digits than its factorization.

11995409975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11702890 (or 11702885 counting only the distinct ones).

The product of its (nonzero) digits is 4592700, while the sum is 59.

The spelling of 11995409975 in words is "eleven billion, nine hundred ninety-five million, four hundred nine thousand, nine hundred seventy-five".