5261011111 has 4 divisors (see below), whose sum is σ = 5261566000. Its totient is φ = 5260456224.

The previous prime is 5261011079. The next prime is 5261011123. The reversal of 5261011111 is 1111101625.

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 5261011111 - 2⁵ = 5261011079 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 (5261018111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262971 + ... + 282268.

It is an arithmetic number, because the mean of its divisors is an integer number (1315391500).

Almost surely, 2^5261011111 is an apocalyptic number.

5261011111 is a deficient number, since it is larger than the sum of its proper divisors (554889).

5261011111 is an equidigital number, since it uses as much as digits as its factorization.

5261011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554888.

The product of its (nonzero) digits is 60, while the sum is 19.

The square root of 5261011111 is about 72532.8278160999. The cubic root of 5261011111 is about 1739.2275506233.

Adding to 5261011111 its reverse (1111101625), we get a palindrome (6372112736).

The spelling of 5261011111 in words is "five billion, two hundred sixty-one million, eleven thousand, one hundred eleven".