16537722444 has 144 divisors (see below), whose sum is σ = 44069616864. Its totient is φ = 5223859200.

The previous prime is 16537722437. The next prime is 16537722457. The reversal of 16537722444 is 44422773561.

16537722444 is a `hidden beast` number, since 1 + 6 + 537 + 72 + 2 + 4 + 44 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 16537722444.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7471882 + ... + 7474094.

It is an arithmetic number, because the mean of its divisors is an integer number (306039006).

Almost surely, 2^16537722444 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 16537722444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22034808432).

16537722444 is an abundant number, since it is smaller than the sum of its proper divisors (27531894420).

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

16537722444 is a wasteful number, since it uses less digits than its factorization.

16537722444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2403 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 45.

The spelling of 16537722444 in words is "sixteen billion, five hundred thirty-seven million, seven hundred twenty-two thousand, four hundred forty-four".