513216541266 has 128 divisors (see below), whose sum is σ = 1244242169856. Its totient is φ = 139053127680.

The previous prime is 513216541183. The next prime is 513216541283. The reversal of 513216541266 is 662145612315.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 3846021 + ... + 3977223.

It is an arithmetic number, because the mean of its divisors is an integer number (9720641952).

Almost surely, 2^513216541266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 513216541266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622121084928).

513216541266 is an abundant number, since it is smaller than the sum of its proper divisors (731025628590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

513216541266 is a wasteful number, since it uses less digits than its factorization.

513216541266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131376.

The product of its digits is 259200, while the sum is 42.

The spelling of 513216541266 in words is "five hundred thirteen billion, two hundred sixteen million, five hundred forty-one thousand, two hundred sixty-six".