16644769000 has 32 divisors (see below), whose sum is σ = 38948761800. Its totient is φ = 6657907200.

The previous prime is 16644768989. The next prime is 16644769019. The reversal of 16644769000 is 96744661.

It can be written as a sum of positive squares in 4 ways, for example, as 2867174116 + 13777594884 = 53546^2 + 117378^2 .

It is a super-2 number, since 2×16644769000² (a number of 21 digits) contains 22 as substring.

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, 8321385 + ... + 8323384.

Almost surely, 2^16644769000 is an apocalyptic number.

16644769000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16644769000 is an abundant number, since it is smaller than the sum of its proper divisors (22303992800).

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

16644769000 is a wasteful number, since it uses less digits than its factorization.

16644769000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16644790 (or 16644776 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The spelling of 16644769000 in words is "sixteen billion, six hundred forty-four million, seven hundred sixty-nine thousand".