5511111061 has 4 divisors (see below), whose sum is σ = 5517325152. Its totient is φ = 5504896972.

The previous prime is 5511111049. The next prime is 5511111071. The reversal of 5511111061 is 1601111155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5511111061 - 2¹⁷ = 5510979989 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 (5511111041) 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, 3105715 + ... + 3107488.

It is an arithmetic number, because the mean of its divisors is an integer number (1379331288).

Almost surely, 2^5511111061 is an apocalyptic number.

It is an amenable number.

5511111061 is a deficient number, since it is larger than the sum of its proper divisors (6214091).

5511111061 is an equidigital number, since it uses as much as digits as its factorization.

5511111061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6214090.

The product of its (nonzero) digits is 150, while the sum is 22.

The square root of 5511111061 is about 74236.8578335587. The cubic root of 5511111061 is about 1766.3620322289.

The spelling of 5511111061 in words is "five billion, five hundred eleven million, one hundred eleven thousand, sixty-one".