5111106561 has 20 divisors (see below), whose sum is σ = 8329212144. Its totient is φ = 3097639800.

The previous prime is 5111106521. The next prime is 5111106577. The reversal of 5111106561 is 1656011115.

5111106561 is a `hidden beast` number, since 5 + 1 + 1 + 1 + 1 + 0 + 656 + 1 = 666.

It is not a de Polignac number, because 5111106561 - 2⁷ = 5111106433 is a prime.

It is a super-2 number, since 2×5111106561² = 52246820555794493442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (5111106521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2867295 + ... + 2869076.

Almost surely, 2^5111106561 is an apocalyptic number.

It is an amenable number.

5111106561 is a deficient number, since it is larger than the sum of its proper divisors (3218105583).

5111106561 is a wasteful number, since it uses less digits than its factorization.

5111106561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5736394 (or 5736385 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 5111106561 is about 71492.0034759133. The cubic root of 5111106561 is about 1722.5492396273.

Adding to 5111106561 its reverse (1656011115), we get a palindrome (6767117676).

The spelling of 5111106561 in words is "five billion, one hundred eleven million, one hundred six thousand, five hundred sixty-one".