16557463731461 has 2 divisors, whose sum is σ = 16557463731462. Its totient is φ = 16557463731460.

The previous prime is 16557463731331. The next prime is 16557463731491. The reversal of 16557463731461 is 16413736475561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11527450944100 + 5030012787361 = 3395210^2 + 2242769^2 .

It is a cyclic number.

It is not a de Polignac number, because 16557463731461 - 2¹⁸ = 16557463469317 is a prime.

It is a super-6 number, since 6×16557463731461⁶ (a number of 81 digits) contains 666666 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16557463731461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16557463731491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8278731865730 + 8278731865731.

It is an arithmetic number, because the mean of its divisors is an integer number (8278731865731).

Almost surely, 2^{16557463731461} is an apocalyptic number.

It is an amenable number.

16557463731461 is a deficient number, since it is larger than the sum of its proper divisors (1).

16557463731461 is an equidigital number, since it uses as much as digits as its factorization.

16557463731461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38102400, while the sum is 59.

The spelling of 16557463731461 in words is "sixteen trillion, five hundred fifty-seven billion, four hundred sixty-three million, seven hundred thirty-one thousand, four hundred sixty-one".