16555407126497 has 2 divisors, whose sum is σ = 16555407126498. Its totient is φ = 16555407126496.

The previous prime is 16555407126457. The next prime is 16555407126563. The reversal of 16555407126497 is 79462170455561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9010106835856 + 7545300290641 = 3001684^2 + 2746871^2 .

It is a cyclic number.

It is not a de Polignac number, because 16555407126497 - 2¹⁴ = 16555407110113 is a prime.

It is not a weakly prime, because it can be changed into another prime (16555407126437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8277703563248 + 8277703563249.

It is an arithmetic number, because the mean of its divisors is an integer number (8277703563249).

Almost surely, 2^{16555407126497} is an apocalyptic number.

It is an amenable number.

16555407126497 is a deficient number, since it is larger than the sum of its proper divisors (1).

16555407126497 is an equidigital number, since it uses as much as digits as its factorization.

16555407126497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504000, while the sum is 62.

The spelling of 16555407126497 in words is "sixteen trillion, five hundred fifty-five billion, four hundred seven million, one hundred twenty-six thousand, four hundred ninety-seven".