11916678605 has 16 divisors (see below), whose sum is σ = 15521286144. Its totient is φ = 8730711360.

The previous prime is 11916678601. The next prime is 11916678611. The reversal of 11916678605 is 50687661911.

It is not a de Polignac number, because 11916678605 - 2² = 11916678601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11916678601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 713531 + ... + 730040.

It is an arithmetic number, because the mean of its divisors is an integer number (970080384).

Almost surely, 2^11916678605 is an apocalyptic number.

It is an amenable number.

11916678605 is a deficient number, since it is larger than the sum of its proper divisors (3604607539).

11916678605 is a wasteful number, since it uses less digits than its factorization.

11916678605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443716.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 11916678605 in words is "eleven billion, nine hundred sixteen million, six hundred seventy-eight thousand, six hundred five".