16709897887 has 8 divisors (see below), whose sum is σ = 16996118832. Its totient is φ = 16424760000.

The previous prime is 16709897881. The next prime is 16709897899. The reversal of 16709897887 is 78879890761.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16709897887 - 2¹⁹ = 16709373599 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 (16709897881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239614 + ... + 301387.

It is an arithmetic number, because the mean of its divisors is an integer number (2124514854).

Almost surely, 2^16709897887 is an apocalyptic number.

16709897887 is a deficient number, since it is larger than the sum of its proper divisors (286220945).

16709897887 is an equidigital number, since it uses as much as digits as its factorization.

16709897887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541529.

The product of its (nonzero) digits is 85349376, while the sum is 70.

The spelling of 16709897887 in words is "sixteen billion, seven hundred nine million, eight hundred ninety-seven thousand, eight hundred eighty-seven".