16568979678 has 32 divisors (see below), whose sum is σ = 38757849600. Its totient is φ = 5232309048.

The previous prime is 16568979641. The next prime is 16568979761. The reversal of 16568979678 is 87697986561.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8073526 + ... + 8075577.

It is an arithmetic number, because the mean of its divisors is an integer number (1211182800).

Almost surely, 2^16568979678 is an apocalyptic number.

16568979678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16568979678 is an abundant number, since it is smaller than the sum of its proper divisors (22188869922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16568979678 is a wasteful number, since it uses less digits than its factorization.

16568979678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16149133 (or 16149127 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The spelling of 16568979678 in words is "sixteen billion, five hundred sixty-eight million, nine hundred seventy-nine thousand, six hundred seventy-eight".