11990159999 has 4 divisors (see below), whose sum is σ = 11990424336. Its totient is φ = 11989895664.

The previous prime is 11990159981. The next prime is 11990160001. The reversal of 11990159999 is 99995109911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11990159999 - 2¹⁶ = 11990094463 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 (11990156999) 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, 44939 + ... + 161244.

It is an arithmetic number, because the mean of its divisors is an integer number (2997606084).

Almost surely, 2^11990159999 is an apocalyptic number.

11990159999 is a deficient number, since it is larger than the sum of its proper divisors (264337).

11990159999 is an equidigital number, since it uses as much as digits as its factorization.

11990159999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264336.

The product of its (nonzero) digits is 2657205, while the sum is 62.

The spelling of 11990159999 in words is "eleven billion, nine hundred ninety million, one hundred fifty-nine thousand, nine hundred ninety-nine".