11978209153 has 4 divisors (see below), whose sum is σ = 11978459860. Its totient is φ = 11977958448.

The previous prime is 11978209127. The next prime is 11978209189. The reversal of 11978209153 is 35190287911.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4413210624 + 7564998529 = 66432^2 + 86977^2 .

It is a cyclic number.

It is not a de Polignac number, because 11978209153 - 2²⁵ = 11944654721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11978209853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28998 + ... + 157471.

It is an arithmetic number, because the mean of its divisors is an integer number (2994614965).

Almost surely, 2^11978209153 is an apocalyptic number.

It is an amenable number.

11978209153 is a deficient number, since it is larger than the sum of its proper divisors (250707).

11978209153 is an equidigital number, since it uses as much as digits as its factorization.

11978209153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250706.

The product of its (nonzero) digits is 136080, while the sum is 46.

The spelling of 11978209153 in words is "eleven billion, nine hundred seventy-eight million, two hundred nine thousand, one hundred fifty-three".