16646940860 has 48 divisors (see below), whose sum is σ = 38783041920. Its totient is φ = 5950827840.

The previous prime is 16646940797. The next prime is 16646940887. The reversal of 16646940860 is 6804964661.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16646940799 and 16646940808.

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, 628274 + ... + 654233.

It is an arithmetic number, because the mean of its divisors is an integer number (807980040).

Almost surely, 2^16646940860 is an apocalyptic number.

16646940860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16646940860 is an abundant number, since it is smaller than the sum of its proper divisors (22136101060).

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

16646940860 is a wasteful number, since it uses less digits than its factorization.

16646940860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282586 (or 1282584 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 16646940860 in words is "sixteen billion, six hundred forty-six million, nine hundred forty thousand, eight hundred sixty".