16991773047 has 6 divisors (see below), whose sum is σ = 24543672192. Its totient is φ = 11327848692.

The previous prime is 16991773039. The next prime is 16991773069. The reversal of 16991773047 is 74037719961.

16991773047 is a `hidden beast` number, since 169 + 9 + 177 + 304 + 7 = 666.

It is not a de Polignac number, because 16991773047 - 2³ = 16991773039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16991772984 and 16991773002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16991773087) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 943987383 + ... + 943987400.

It is an arithmetic number, because the mean of its divisors is an integer number (4090612032).

Almost surely, 2^16991773047 is an apocalyptic number.

16991773047 is a deficient number, since it is larger than the sum of its proper divisors (7551899145).

16991773047 is a wasteful number, since it uses less digits than its factorization.

16991773047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887974789 (or 1887974786 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 54.

The spelling of 16991773047 in words is "sixteen billion, nine hundred ninety-one million, seven hundred seventy-three thousand, forty-seven".