5561156511 has 12 divisors (see below), whose sum is σ = 8047210392. Its totient is φ = 3700778256.

The previous prime is 5561156507. The next prime is 5561156519. The reversal of 5561156511 is 1156511655.

It is a happy number.

5561156511 is a `hidden beast` number, since 556 + 1 + 1 + 56 + 51 + 1 = 666.

It is not a de Polignac number, because 5561156511 - 2² = 5561156507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561156519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 549661 + ... + 559686.

It is an arithmetic number, because the mean of its divisors is an integer number (670600866).

Almost surely, 2^5561156511 is an apocalyptic number.

5561156511 is a deficient number, since it is larger than the sum of its proper divisors (2486053881).

5561156511 is a wasteful number, since it uses less digits than its factorization.

5561156511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109910 (or 1109907 counting only the distinct ones).

The product of its digits is 22500, while the sum is 36.

The square root of 5561156511 is about 74573.1621362538. The cubic root of 5561156511 is about 1771.6926057281.

The spelling of 5561156511 in words is "five billion, five hundred sixty-one million, one hundred fifty-six thousand, five hundred eleven".