16968946640 has 40 divisors (see below), whose sum is σ = 39513899520. Its totient is φ = 6777067136.

The previous prime is 16968946609. The next prime is 16968946649. The reversal of 16968946640 is 4664986961.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 16968946640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16968946649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112160 + ... + 215679.

It is an arithmetic number, because the mean of its divisors is an integer number (987847488).

Almost surely, 2^16968946640 is an apocalyptic number.

16968946640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16968946640 is an abundant number, since it is smaller than the sum of its proper divisors (22544952880).

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

16968946640 is a wasteful number, since it uses less digits than its factorization.

16968946640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328499 (or 328493 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 59.

The spelling of 16968946640 in words is "sixteen billion, nine hundred sixty-eight million, nine hundred forty-six thousand, six hundred forty".