5261520611 has 4 divisors (see below), whose sum is σ = 5389850424. Its totient is φ = 5133190800.

The previous prime is 5261520571. The next prime is 5261520617. The reversal of 5261520611 is 1160251625.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5261520611 - 2¹⁸ = 5261258467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5261520617) 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 3 ways as a sum of consecutive naturals, for example, 64164845 + ... + 64164926.

It is an arithmetic number, because the mean of its divisors is an integer number (1347462606).

Almost surely, 2^5261520611 is an apocalyptic number.

5261520611 is a deficient number, since it is larger than the sum of its proper divisors (128329813).

5261520611 is a wasteful number, since it uses less digits than its factorization.

5261520611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128329812.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 5261520611 is about 72536.3399338566. The cubic root of 5261520611 is about 1739.2836936862.

The spelling of 5261520611 in words is "five billion, two hundred sixty-one million, five hundred twenty thousand, six hundred eleven".