16555740685 has 16 divisors (see below), whose sum is σ = 22028268672. Its totient is φ = 11843150400.

The previous prime is 16555740667. The next prime is 16555740739. The reversal of 16555740685 is 58604755561.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-16555740685 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 2463969 + ... + 2470678.

It is an arithmetic number, because the mean of its divisors is an integer number (1376766792).

Almost surely, 2^16555740685 is an apocalyptic number.

It is an amenable number.

16555740685 is a deficient number, since it is larger than the sum of its proper divisors (5472527987).

16555740685 is a wasteful number, since it uses less digits than its factorization.

16555740685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934724.

The product of its (nonzero) digits is 5040000, while the sum is 52.

The spelling of 16555740685 in words is "sixteen billion, five hundred fifty-five million, seven hundred forty thousand, six hundred eighty-five".