16224997440 has 56 divisors (see below), whose sum is σ = 51514369920. Its totient is φ = 4326665728.

The previous prime is 16224997429. The next prime is 16224997487. The reversal of 16224997440 is 4479942261.

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 16224997440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8449560 + ... + 8451479.

Almost surely, 2^16224997440 is an apocalyptic number.

16224997440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16224997440 is an abundant number, since it is smaller than the sum of its proper divisors (35289372480).

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

16224997440 is a wasteful number, since it uses less digits than its factorization.

16224997440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16901059 (or 16901049 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 16224997440 in words is "sixteen billion, two hundred twenty-four million, nine hundred ninety-seven thousand, four hundred forty".