16656949879812 has 144 divisors (see below), whose sum is σ = 47497961189952. Its totient is φ = 4878407888640.

The previous prime is 16656949879811. The next prime is 16656949879813. The reversal of 16656949879812 is 21897894965661.

16656949879812 is a `hidden beast` number, since 1 + 6 + 6 + 56 + 9 + 498 + 79 + 8 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (16656949879811) and next prime (16656949879813).

It is not an unprimeable number, because it can be changed into a prime (16656949879811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4516503 + ... + 7328894.

It is an arithmetic number, because the mean of its divisors is an integer number (329846952708).

Almost surely, 2^{16656949879812} is an apocalyptic number.

16656949879812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16656949879812 is an abundant number, since it is smaller than the sum of its proper divisors (30841011310140).

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

16656949879812 is a wasteful number, since it uses less digits than its factorization.

16656949879812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11845538 (or 11845533 counting only the distinct ones).

The product of its digits is 2821754880, while the sum is 81.

The spelling of 16656949879812 in words is "sixteen trillion, six hundred fifty-six billion, nine hundred forty-nine million, eight hundred seventy-nine thousand, eight hundred twelve".