11916161437 has 4 divisors (see below), whose sum is σ = 11923135740. Its totient is φ = 11909187136.

The previous prime is 11916161423. The next prime is 11916161447. The reversal of 11916161437 is 73416161911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73416161911 = 223 ⋅329220457.

It can be written as a sum of positive squares in 2 ways, for example, as 7030990201 + 4885171236 = 83851^2 + 69894^2 .

It is a cyclic number.

It is not a de Polignac number, because 11916161437 - 2¹⁵ = 11916128669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11916161437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11916161447) 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, 3484588 + ... + 3488005.

It is an arithmetic number, because the mean of its divisors is an integer number (2980783935).

Almost surely, 2^11916161437 is an apocalyptic number.

It is an amenable number.

11916161437 is a deficient number, since it is larger than the sum of its proper divisors (6974303).

11916161437 is an equidigital number, since it uses as much as digits as its factorization.

11916161437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974302.

The product of its digits is 27216, while the sum is 40.

The spelling of 11916161437 in words is "eleven billion, nine hundred sixteen million, one hundred sixty-one thousand, four hundred thirty-seven".