16993147440 has 80 divisors (see below), whose sum is σ = 52703912448. Its totient is φ = 4529342208.

The previous prime is 16993147433. The next prime is 16993147441. The reversal of 16993147440 is 4474139961.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 16993147440.

It is not an unprimeable number, because it can be changed into a prime (16993147441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522537 + ... + 554103.

Almost surely, 2^16993147440 is an apocalyptic number.

16993147440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16993147440 is an abundant number, since it is smaller than the sum of its proper divisors (35710765008).

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

16993147440 is a wasteful number, since it uses less digits than its factorization.

16993147440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33826 (or 33820 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 48.

The spelling of 16993147440 in words is "sixteen billion, nine hundred ninety-three million, one hundred forty-seven thousand, four hundred forty".