16008778811 has 4 divisors (see below), whose sum is σ = 16164203952. Its totient is φ = 15853353672.

The previous prime is 16008778787. The next prime is 16008778813. The reversal of 16008778811 is 11887780061.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16008778811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16008778813) 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, 77712416 + ... + 77712621.

It is an arithmetic number, because the mean of its divisors is an integer number (4041050988).

Almost surely, 2^16008778811 is an apocalyptic number.

16008778811 is a deficient number, since it is larger than the sum of its proper divisors (155425141).

16008778811 is a wasteful number, since it uses less digits than its factorization.

16008778811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155425140.

The product of its (nonzero) digits is 150528, while the sum is 47.

The spelling of 16008778811 in words is "sixteen billion, eight million, seven hundred seventy-eight thousand, eight hundred eleven".