11916039861 has 24 divisors (see below), whose sum is σ = 19176303744. Its totient is φ = 7068183360.

The previous prime is 11916039833. The next prime is 11916039871. The reversal of 11916039861 is 16893061911.

It is not a de Polignac number, because 11916039861 - 2¹³ = 11916031669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11916039871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1275816 + ... + 1285121.

It is an arithmetic number, because the mean of its divisors is an integer number (799012656).

Almost surely, 2^11916039861 is an apocalyptic number.

11916039861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11916039861 is a deficient number, since it is larger than the sum of its proper divisors (7260263883).

11916039861 is a wasteful number, since it uses less digits than its factorization.

11916039861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561001 (or 2560998 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 45.

The spelling of 11916039861 in words is "eleven billion, nine hundred sixteen million, thirty-nine thousand, eight hundred sixty-one".