1055561005111 has 4 divisors (see below), whose sum is σ = 1056045431800. Its totient is φ = 1055076578424.

The previous prime is 1055561005069. The next prime is 1055561005123. The reversal of 1055561005111 is 1115001655501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1055561005111 - 2⁷ = 1055561004983 is a prime.

It is a super-2 number, since 2×1055561005111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055561005711) 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, 242210076 + ... + 242214433.

It is an arithmetic number, because the mean of its divisors is an integer number (264011357950).

Almost surely, 2^{1055561005111} is an apocalyptic number.

1055561005111 is a deficient number, since it is larger than the sum of its proper divisors (484426689).

1055561005111 is an equidigital number, since it uses as much as digits as its factorization.

1055561005111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484426688.

The product of its (nonzero) digits is 3750, while the sum is 31.

The spelling of 1055561005111 in words is "one trillion, fifty-five billion, five hundred sixty-one million, five thousand, one hundred eleven".