11978261113 has 32 divisors (see below), whose sum is σ = 15005233152. Its totient is φ = 9309384000.

The previous prime is 11978261111. The next prime is 11978261129. The reversal of 11978261113 is 31116287911.

It is not a de Polignac number, because 11978261113 - 2¹ = 11978261111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11978261111) 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 31 ways as a sum of consecutive naturals, for example, 1825188 + ... + 1831738.

It is an arithmetic number, because the mean of its divisors is an integer number (468913536).

Almost surely, 2^11978261113 is an apocalyptic number.

11978261113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11978261113 is a deficient number, since it is larger than the sum of its proper divisors (3026972039).

11978261113 is a wasteful number, since it uses less digits than its factorization.

11978261113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925.

The product of its digits is 18144, while the sum is 40.

The spelling of 11978261113 in words is "eleven billion, nine hundred seventy-eight million, two hundred sixty-one thousand, one hundred thirteen".