13216440877 has 4 divisors (see below), whose sum is σ = 13465807740. Its totient is φ = 12967074016.

The previous prime is 13216440871. The next prime is 13216440931. The reversal of 13216440877 is 77804461231.

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 5332066441 + 7884374436 = 73021^2 + 88794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13216440877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13216440871) 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, 124683352 + ... + 124683457.

It is an arithmetic number, because the mean of its divisors is an integer number (3366451935).

Almost surely, 2^13216440877 is an apocalyptic number.

It is an amenable number.

13216440877 is a deficient number, since it is larger than the sum of its proper divisors (249366863).

13216440877 is an equidigital number, since it uses as much as digits as its factorization.

13216440877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249366862.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 13216440877 in words is "thirteen billion, two hundred sixteen million, four hundred forty thousand, eight hundred seventy-seven".