16401668748 has 48 divisors (see below), whose sum is σ = 40537695744. Its totient is φ = 5143599360.

The previous prime is 16401668729. The next prime is 16401668771. The reversal of 16401668748 is 84786610461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 16401668748.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554961 + ... + 583767.

It is an arithmetic number, because the mean of its divisors is an integer number (844535328).

Almost surely, 2^16401668748 is an apocalyptic number.

It is an amenable number.

16401668748 is an abundant number, since it is smaller than the sum of its proper divisors (24136026996).

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

16401668748 is a wasteful number, since it uses less digits than its factorization.

16401668748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31622 (or 31620 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 51.

The spelling of 16401668748 in words is "sixteen billion, four hundred one million, six hundred sixty-eight thousand, seven hundred forty-eight".