16700517187 has 4 divisors (see below), whose sum is σ = 17276397120. Its totient is φ = 16124637256.

The previous prime is 16700517139. The next prime is 16700517221. The reversal of 16700517187 is 78171500761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78171500761 = 7433 ⋅10516817.

It is a cyclic number.

It is not a de Polignac number, because 16700517187 - 2⁷ = 16700517059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16700517107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287939923 + ... + 287939980.

It is an arithmetic number, because the mean of its divisors is an integer number (4319099280).

Almost surely, 2^16700517187 is an apocalyptic number.

16700517187 is a deficient number, since it is larger than the sum of its proper divisors (575879933).

16700517187 is an equidigital number, since it uses as much as digits as its factorization.

16700517187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575879932.

The product of its (nonzero) digits is 82320, while the sum is 43.

The spelling of 16700517187 in words is "sixteen billion, seven hundred million, five hundred seventeen thousand, one hundred eighty-seven".