16601455987 has 2 divisors, whose sum is σ = 16601455988. Its totient is φ = 16601455986.

The previous prime is 16601455939. The next prime is 16601455991. The reversal of 16601455987 is 78955410661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16601455987 is a prime.

It is not a weakly prime, because it can be changed into another prime (16601455187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8300727993 + 8300727994.

It is an arithmetic number, because the mean of its divisors is an integer number (8300727994).

Almost surely, 2^16601455987 is an apocalyptic number.

16601455987 is a deficient number, since it is larger than the sum of its proper divisors (1).

16601455987 is an equidigital number, since it uses as much as digits as its factorization.

16601455987 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 52.

The spelling of 16601455987 in words is "sixteen billion, six hundred one million, four hundred fifty-five thousand, nine hundred eighty-seven".