16500144 has 40 divisors (see below), whose sum is σ = 42784960. Its totient is φ = 5479488.

The previous prime is 16500139. The next prime is 16500161. The reversal of 16500144 is 44100561.

It is a self number, because there is not a number n which added to its sum of digits gives 16500144.

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, 17739 + ... + 18645.

It is an arithmetic number, because the mean of its divisors is an integer number (1069624).

Almost surely, 2^16500144 is an apocalyptic number.

It is an amenable number.

16500144 is an abundant number, since it is smaller than the sum of its proper divisors (26284816).

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

16500144 is a wasteful number, since it uses less digits than its factorization.

16500144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1291 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 16500144 is about 4062.0369274540. The cubic root of 16500144 is about 254.5829090835.

The spelling of 16500144 in words is "sixteen million, five hundred thousand, one hundred forty-four".