16551083987 has 2 divisors, whose sum is σ = 16551083988. Its totient is φ = 16551083986.

The previous prime is 16551083933. The next prime is 16551084007. The reversal of 16551083987 is 78938015561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16551083987 - 2²² = 16546889683 is a prime.

It is a super-2 number, since 2×16551083987² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16551083587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8275541993 + 8275541994.

It is an arithmetic number, because the mean of its divisors is an integer number (8275541994).

Almost surely, 2^16551083987 is an apocalyptic number.

16551083987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16551083987 is an equidigital number, since it uses as much as digits as its factorization.

16551083987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 16551083987 in words is "sixteen billion, five hundred fifty-one million, eighty-three thousand, nine hundred eighty-seven".