16994396787 has 8 divisors (see below), whose sum is σ = 22663777536. Its totient is φ = 11327306952.

The previous prime is 16994396767. The next prime is 16994396849. The reversal of 16994396787 is 78769349961.

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

It is not a de Polignac number, because 16994396787 - 2¹² = 16994392691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16994396737) 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, 555343 + ... + 585144.

It is an arithmetic number, because the mean of its divisors is an integer number (2832972192).

Almost surely, 2^16994396787 is an apocalyptic number.

16994396787 is a deficient number, since it is larger than the sum of its proper divisors (5669380749).

16994396787 is a wasteful number, since it uses less digits than its factorization.

16994396787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145457.

The product of its digits is 123451776, while the sum is 69.

The spelling of 16994396787 in words is "sixteen billion, nine hundred ninety-four million, three hundred ninety-six thousand, seven hundred eighty-seven".