16278117009 has 16 divisors (see below), whose sum is σ = 27059727360. Its totient is φ = 8456164560.

The previous prime is 16278117001. The next prime is 16278117041. The reversal of 16278117009 is 90071187261.

It is not a de Polignac number, because 16278117009 - 2³ = 16278117001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16278117001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35233789 + ... + 35234250.

It is an arithmetic number, because the mean of its divisors is an integer number (1691232960).

Almost surely, 2^16278117009 is an apocalyptic number.

It is an amenable number.

16278117009 is a deficient number, since it is larger than the sum of its proper divisors (10781610351).

16278117009 is a wasteful number, since it uses less digits than its factorization.

16278117009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70468060.

The product of its (nonzero) digits is 42336, while the sum is 42.

The spelling of 16278117009 in words is "sixteen billion, two hundred seventy-eight million, one hundred seventeen thousand, nine".