56511005105 has 16 divisors (see below), whose sum is σ = 68602834560. Its totient is φ = 44684068608.

The previous prime is 56511005099. The next prime is 56511005143. The reversal of 56511005105 is 50150011565.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 56511005105 - 2⁶ = 56511005041 is a prime.

It is a super-2 number, since 2×56511005105² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164441 + ... + 374249.

It is an arithmetic number, because the mean of its divisors is an integer number (4287677160).

Almost surely, 2^56511005105 is an apocalyptic number.

It is an amenable number.

56511005105 is a deficient number, since it is larger than the sum of its proper divisors (12091829455).

56511005105 is a wasteful number, since it uses less digits than its factorization.

56511005105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210440.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 56511005105 in words is "fifty-six billion, five hundred eleven million, five thousand, one hundred five".