16461900606439 has 2 divisors, whose sum is σ = 16461900606440. Its totient is φ = 16461900606438.

The previous prime is 16461900606401. The next prime is 16461900606493. The reversal of 16461900606439 is 93460600916461.

Together with next prime (16461900606493) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16461900606439 - 2¹⁹ = 16461900082151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16461900606439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16461900606139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8230950303219 + 8230950303220.

It is an arithmetic number, because the mean of its divisors is an integer number (8230950303220).

Almost surely, 2^{16461900606439} is an apocalyptic number.

16461900606439 is a deficient number, since it is larger than the sum of its proper divisors (1).

16461900606439 is an equidigital number, since it uses as much as digits as its factorization.

16461900606439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 16461900606439 in words is "sixteen trillion, four hundred sixty-one billion, nine hundred million, six hundred six thousand, four hundred thirty-nine".