16545665517540 has 96 divisors (see below), whose sum is σ = 47969471047680. Its totient is φ = 4256113860096.

The previous prime is 16545665517487. The next prime is 16545665517611. The reversal of 16545665517540 is 4571556654561.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2482587 + ... + 6265346.

It is an arithmetic number, because the mean of its divisors is an integer number (499681990080).

Almost surely, 2^{16545665517540} is an apocalyptic number.

16545665517540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16545665517540 is an abundant number, since it is smaller than the sum of its proper divisors (31423805530140).

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

16545665517540 is a wasteful number, since it uses less digits than its factorization.

16545665517540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8749061 (or 8749059 counting only the distinct ones).

The product of its (nonzero) digits is 75600000, while the sum is 60.

The spelling of 16545665517540 in words is "sixteen trillion, five hundred forty-five billion, six hundred sixty-five million, five hundred seventeen thousand, five hundred forty".