16557463731356 has 12 divisors (see below), whose sum is σ = 28979892104520. Its totient is φ = 8277494558640.

The previous prime is 16557463731331. The next prime is 16557463731461. The reversal of 16557463731356 is 65313736475561.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309296651 + ... + 309350178.

It is an arithmetic number, because the mean of its divisors is an integer number (2414991008710).

Almost surely, 2^{16557463731356} is an apocalyptic number.

It is an amenable number.

16557463731356 is a deficient number, since it is larger than the sum of its proper divisors (12422428373164).

16557463731356 is a wasteful number, since it uses less digits than its factorization.

16557463731356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618653524 (or 618653522 counting only the distinct ones).

The product of its digits is 142884000, while the sum is 62.

The spelling of 16557463731356 in words is "sixteen trillion, five hundred fifty-seven billion, four hundred sixty-three million, seven hundred thirty-one thousand, three hundred fifty-six".