16000001664 has 32 divisors (see below), whose sum is σ = 42500005440. Its totient is φ = 5333333760.

The previous prime is 16000001653. The next prime is 16000001701. The reversal of 16000001664 is 46610000061.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20832952 + ... + 20833719.

It is an arithmetic number, because the mean of its divisors is an integer number (1328125170).

Almost surely, 2^16000001664 is an apocalyptic number.

It is an amenable number.

16000001664 is an abundant number, since it is smaller than the sum of its proper divisors (26500003776).

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

16000001664 is an equidigital number, since it uses as much as digits as its factorization.

16000001664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41666688 (or 41666676 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The spelling of 16000001664 in words is "sixteen billion, one thousand, six hundred sixty-four".