5111111061 has 54 divisors (see below), whose sum is σ = 8895054402. Its totient is φ = 2819718720.

The previous prime is 5111111053. The next prime is 5111111077. The reversal of 5111111061 is 1601111115.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 979064100 + 4132046961 = 31290^2 + 64281^2 .

It is not a de Polignac number, because 5111111061 - 2³ = 5111111053 is a prime.

It is a super-2 number, since 2×5111111061² = 52246912555753091442, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5111111041) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 363991 + ... + 377771.

Almost surely, 2^5111111061 is an apocalyptic number.

It is an amenable number.

5111111061 is a deficient number, since it is larger than the sum of its proper divisors (3783943341).

5111111061 is a wasteful number, since it uses less digits than its factorization.

5111111061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13859 (or 13820 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 18.

The square root of 5111111061 is about 71492.0349479577. The cubic root of 5111111061 is about 1722.5497451584.

Adding to 5111111061 its reverse (1601111115), we get a palindrome (6712222176).

The spelling of 5111111061 in words is "five billion, one hundred eleven million, one hundred eleven thousand, sixty-one".