16545651621764 has 48 divisors (see below), whose sum is σ = 30375928267776. Its totient is φ = 7870762020000.

The previous prime is 16545651621749. The next prime is 16545651621823. The reversal of 16545651621764 is 46712615654561.

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, 16295099 + ... + 17280669.

It is an arithmetic number, because the mean of its divisors is an integer number (632831838912).

Almost surely, 2^{16545651621764} is an apocalyptic number.

It is an amenable number.

16545651621764 is a deficient number, since it is larger than the sum of its proper divisors (13830276646012).

16545651621764 is a wasteful number, since it uses less digits than its factorization.

16545651621764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986576 (or 986574 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 59.

The spelling of 16545651621764 in words is "sixteen trillion, five hundred forty-five billion, six hundred fifty-one million, six hundred twenty-one thousand, seven hundred sixty-four".