16556214157557 has 16 divisors (see below), whose sum is σ = 23476346362560. Its totient is φ = 10348756756992.

The previous prime is 16556214157517. The next prime is 16556214157607. The reversal of 16556214157557 is 75575141265561.

16556214157557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16556214157557 - 2²⁷ = 16556079939829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16556214157557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556214157517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1497210438 + ... + 1497221495.

It is an arithmetic number, because the mean of its divisors is an integer number (1467271647660).

Almost surely, 2^{16556214157557} is an apocalyptic number.

It is an amenable number.

16556214157557 is a deficient number, since it is larger than the sum of its proper divisors (6920132205003).

16556214157557 is a wasteful number, since it uses less digits than its factorization.

16556214157557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994432052.

The product of its digits is 44100000, while the sum is 60.

The spelling of 16556214157557 in words is "sixteen trillion, five hundred fifty-six billion, two hundred fourteen million, one hundred fifty-seven thousand, five hundred fifty-seven".