1206505305533 has 16 divisors (see below), whose sum is σ = 1336950339264. Its totient is φ = 1079651314560.

The previous prime is 1206505305497. The next prime is 1206505305601. The reversal of 1206505305533 is 3355035056021.

It is a cyclic number.

It is not a de Polignac number, because 1206505305533 - 2¹⁶ = 1206505239997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206505305133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3079760 + ... + 3449337.

It is an arithmetic number, because the mean of its divisors is an integer number (83559396204).

Almost surely, 2^{1206505305533} is an apocalyptic number.

It is an amenable number.

1206505305533 is a deficient number, since it is larger than the sum of its proper divisors (130445033731).

1206505305533 is a wasteful number, since it uses less digits than its factorization.

1206505305533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6529372.

The product of its (nonzero) digits is 202500, while the sum is 38.

The spelling of 1206505305533 in words is "one trillion, two hundred six billion, five hundred five million, three hundred five thousand, five hundred thirty-three".