16243955464 has 64 divisors (see below), whose sum is σ = 35414236800. Its totient is φ = 6903168000.

The previous prime is 16243955443. The next prime is 16243955477. The reversal of 16243955464 is 46455934261.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

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, 189942 + ... + 261850.

It is an arithmetic number, because the mean of its divisors is an integer number (553347450).

Almost surely, 2^16243955464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16243955464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17707118400).

16243955464 is an abundant number, since it is smaller than the sum of its proper divisors (19170281336).

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

16243955464 is a wasteful number, since it uses less digits than its factorization.

16243955464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72094 (or 72090 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 49.

The spelling of 16243955464 in words is "sixteen billion, two hundred forty-three million, nine hundred fifty-five thousand, four hundred sixty-four".