16553678438 has 32 divisors (see below), whose sum is σ = 27767912832. Its totient is φ = 7336123200.

The previous prime is 16553678423. The next prime is 16553678459. The reversal of 16553678438 is 83487635561.

It is a super-2 number, since 2×16553678438² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517058 + ... + 548138.

It is an arithmetic number, because the mean of its divisors is an integer number (867747276).

Almost surely, 2^16553678438 is an apocalyptic number.

16553678438 is a deficient number, since it is larger than the sum of its proper divisors (11214234394).

16553678438 is a wasteful number, since it uses less digits than its factorization.

16553678438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31700.

The product of its digits is 14515200, while the sum is 56.

The spelling of 16553678438 in words is "sixteen billion, five hundred fifty-three million, six hundred seventy-eight thousand, four hundred thirty-eight".