16557008887 has 2 divisors, whose sum is σ = 16557008888. Its totient is φ = 16557008886.

The previous prime is 16557008879. The next prime is 16557008903. The reversal of 16557008887 is 78880075561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16557008887 - 2³ = 16557008879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16557008687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278504443 + 8278504444.

It is an arithmetic number, because the mean of its divisors is an integer number (8278504444).

Almost surely, 2^16557008887 is an apocalyptic number.

16557008887 is a deficient number, since it is larger than the sum of its proper divisors (1).

16557008887 is an equidigital number, since it uses as much as digits as its factorization.

16557008887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3763200, while the sum is 55.

The spelling of 16557008887 in words is "sixteen billion, five hundred fifty-seven million, eight thousand, eight hundred eighty-seven".