5111056561 has 8 divisors (see below), whose sum is σ = 5510296064. Its totient is φ = 4712685840.

The previous prime is 5111056553. The next prime is 5111056571. The reversal of 5111056561 is 1656501115.

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

It is a cyclic number.

It is not a de Polignac number, because 5111056561 - 2³ = 5111056553 is a prime.

It is a super-2 number, since 2×5111056561² = 52245798339482293442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5111056571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204945 + ... + 228526.

It is an arithmetic number, because the mean of its divisors is an integer number (688787008).

Almost surely, 2^5111056561 is an apocalyptic number.

It is an amenable number.

5111056561 is a deficient number, since it is larger than the sum of its proper divisors (399239503).

5111056561 is a wasteful number, since it uses less digits than its factorization.

5111056561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434391.

The product of its (nonzero) digits is 4500, while the sum is 31.

The square root of 5111056561 is about 71491.6537855993. The cubic root of 5111056561 is about 1722.5436225956.

Adding to 5111056561 its reverse (1656501115), we get a palindrome (6767557676).

The spelling of 5111056561 in words is "five billion, one hundred eleven million, fifty-six thousand, five hundred sixty-one".