16205151887 has 4 divisors (see below), whose sum is σ = 16600399536. Its totient is φ = 15809904240.

The previous prime is 16205151881. The next prime is 16205151917. The reversal of 16205151887 is 78815150261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78815150261 = 2477 ⋅31818793.

It is a cyclic number.

It is not a de Polignac number, because 16205151887 - 2²² = 16200957583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16205151881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197623763 + ... + 197623844.

It is an arithmetic number, because the mean of its divisors is an integer number (4150099884).

Almost surely, 2^16205151887 is an apocalyptic number.

16205151887 is a deficient number, since it is larger than the sum of its proper divisors (395247649).

16205151887 is an equidigital number, since it uses as much as digits as its factorization.

16205151887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395247648.

The product of its (nonzero) digits is 134400, while the sum is 44.

The spelling of 16205151887 in words is "sixteen billion, two hundred five million, one hundred fifty-one thousand, eight hundred eighty-seven".