16578168612 has 12 divisors (see below), whose sum is σ = 38682393456. Its totient is φ = 5526056200.

The previous prime is 16578168611. The next prime is 16578168619. The reversal of 16578168612 is 21686187561.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (16578168611) 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, 690757014 + ... + 690757037.

It is an arithmetic number, because the mean of its divisors is an integer number (3223532788).

Almost surely, 2^16578168612 is an apocalyptic number.

16578168612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16578168612 is an abundant number, since it is smaller than the sum of its proper divisors (22104224844).

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

16578168612 is a wasteful number, since it uses less digits than its factorization.

16578168612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1381514058 (or 1381514056 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The spelling of 16578168612 in words is "sixteen billion, five hundred seventy-eight million, one hundred sixty-eight thousand, six hundred twelve".