16420551433487 has 2 divisors, whose sum is σ = 16420551433488. Its totient is φ = 16420551433486.

The previous prime is 16420551433459. The next prime is 16420551433651. The reversal of 16420551433487 is 78433415502461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16420551433487 - 2¹⁶ = 16420551367951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16420551433687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8210275716743 + 8210275716744.

It is an arithmetic number, because the mean of its divisors is an integer number (8210275716744).

Almost surely, 2^{16420551433487} is an apocalyptic number.

16420551433487 is a deficient number, since it is larger than the sum of its proper divisors (1).

16420551433487 is an equidigital number, since it uses as much as digits as its factorization.

16420551433487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9676800, while the sum is 53.

The spelling of 16420551433487 in words is "sixteen trillion, four hundred twenty billion, five hundred fifty-one million, four hundred thirty-three thousand, four hundred eighty-seven".