16555273155361 has 2 divisors, whose sum is σ = 16555273155362. Its totient is φ = 16555273155360.

The previous prime is 16555273155347. The next prime is 16555273155419. The reversal of 16555273155361 is 16355137255561.

16555273155361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15415289865361 + 1139983290000 = 3926231^2 + 1067700^2 .

It is a cyclic number.

It is not a de Polignac number, because 16555273155361 - 2¹³ = 16555273147169 is a prime.

It is a super-2 number, since 2×16555273155361² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16555273155331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277636577680 + 8277636577681.

It is an arithmetic number, because the mean of its divisors is an integer number (8277636577681).

Almost surely, 2^{16555273155361} is an apocalyptic number.

It is an amenable number.

16555273155361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555273155361 is an equidigital number, since it uses as much as digits as its factorization.

16555273155361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14175000, while the sum is 55.

The spelling of 16555273155361 in words is "sixteen trillion, five hundred fifty-five billion, two hundred seventy-three million, one hundred fifty-five thousand, three hundred sixty-one".