16556025705464 has 16 divisors (see below), whose sum is σ = 35477197940400. Its totient is φ = 7095439588032.

The previous prime is 16556025705463. The next prime is 16556025705503. The reversal of 16556025705464 is 46450752065561.

It is a Harshad number since it is a multiple of its sum of digits (56), and also a Moran number because the ratio is a prime number: 295643316169 = 16556025705464 / (1 + 6 + 5 + 5 + 6 + 0 + 2 + 5 + 7 + 0 + 5 + 4 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556025705463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147821658029 + ... + 147821658140.

It is an arithmetic number, because the mean of its divisors is an integer number (2217324871275).

Almost surely, 2^{16556025705464} is an apocalyptic number.

16556025705464 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16556025705464 is an abundant number, since it is smaller than the sum of its proper divisors (18921172234936).

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

16556025705464 is a wasteful number, since it uses less digits than its factorization.

16556025705464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295643316182 (or 295643316178 counting only the distinct ones).

The product of its (nonzero) digits is 30240000, while the sum is 56.

The spelling of 16556025705464 in words is "sixteen trillion, five hundred fifty-six billion, twenty-five million, seven hundred five thousand, four hundred sixty-four".