16742989787 has 4 divisors (see below), whose sum is σ = 16751375856. Its totient is φ = 16734603720.

The previous prime is 16742989759. The next prime is 16742989793. The reversal of 16742989787 is 78798924761.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16742989787 - 2²⁸ = 16474554331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16742982787) 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, 4190039 + ... + 4194032.

It is an arithmetic number, because the mean of its divisors is an integer number (4187843964).

Almost surely, 2^16742989787 is an apocalyptic number.

16742989787 is a deficient number, since it is larger than the sum of its proper divisors (8386069).

16742989787 is an equidigital number, since it uses as much as digits as its factorization.

16742989787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8386068.

The product of its digits is 85349376, while the sum is 68.

The spelling of 16742989787 in words is "sixteen billion, seven hundred forty-two million, nine hundred eighty-nine thousand, seven hundred eighty-seven".