16436813387 has 4 divisors (see below), whose sum is σ = 16437342216. Its totient is φ = 16436284560.

The previous prime is 16436813381. The next prime is 16436813389. The reversal of 16436813387 is 78331863461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78331863461 = 467 ⋅167734183.

It is a cyclic number.

It is not a de Polignac number, because 16436813387 - 2²⁶ = 16369704523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16436813381) 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, 214673 + ... + 280994.

It is an arithmetic number, because the mean of its divisors is an integer number (4109335554).

Almost surely, 2^16436813387 is an apocalyptic number.

16436813387 is a deficient number, since it is larger than the sum of its proper divisors (528829).

16436813387 is an equidigital number, since it uses as much as digits as its factorization.

16436813387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528828.

The product of its digits is 1741824, while the sum is 50.

The spelling of 16436813387 in words is "sixteen billion, four hundred thirty-six million, eight hundred thirteen thousand, three hundred eighty-seven".