5266520781 has 8 divisors (see below), whose sum is σ = 7040363520. Its totient is φ = 3501845952.

The previous prime is 5266520767. The next prime is 5266520789. The reversal of 5266520781 is 1870256625.

5266520781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5266520781 - 2¹⁸ = 5266258637 is a prime.

It is a super-2 number, since 2×5266520781² = 55472482273409699922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5266520789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2290636 + ... + 2292933.

It is an arithmetic number, because the mean of its divisors is an integer number (880045440).

Almost surely, 2^5266520781 is an apocalyptic number.

It is an amenable number.

5266520781 is a deficient number, since it is larger than the sum of its proper divisors (1773842739).

5266520781 is a wasteful number, since it uses less digits than its factorization.

5266520781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4583955.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 5266520781 is about 72570.7984040413. The cubic root of 5266520781 is about 1739.8344825381.

The spelling of 5266520781 in words is "five billion, two hundred sixty-six million, five hundred twenty thousand, seven hundred eighty-one".