1055556511 has 4 divisors (see below), whose sum is σ = 1056473152. Its totient is φ = 1054639872.

The previous prime is 1055556499. The next prime is 1055556517. The reversal of 1055556511 is 1156555501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1156555501 = 2399 ⋅482099.

It is a cyclic number.

It is not a de Polignac number, because 1055556511 - 2⁹ = 1055555999 is a prime.

It is a super-2 number, since 2×1055556511² = 2228399095828986242, which 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 (1055556517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456591 + ... + 458896.

It is an arithmetic number, because the mean of its divisors is an integer number (264118288).

Almost surely, 2^1055556511 is an apocalyptic number.

1055556511 is a deficient number, since it is larger than the sum of its proper divisors (916641).

1055556511 is an equidigital number, since it uses as much as digits as its factorization.

1055556511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916640.

The product of its (nonzero) digits is 18750, while the sum is 34.

The square root of 1055556511 is about 32489.3291866730. The cubic root of 1055556511 is about 1018.1860979211.

The spelling of 1055556511 in words is "one billion, fifty-five million, five hundred fifty-six thousand, five hundred eleven".