1000555555 has 16 divisors (see below), whose sum is σ = 1222183584. Its totient is φ = 786170880.

The previous prime is 1000555547. The next prime is 1000555559. The reversal of 1000555555 is 5555550001.

It is not a de Polignac number, because 1000555555 - 2³ = 1000555547 is a prime.

It is a super-2 number, since 2×1000555555² = 2002222837282716050, which contains 22 as substring.

It is a Duffinian number.

1000555555 is a modest number, since divided by 55555 gives 10005 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1000555559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114025 + ... + 122485.

It is an arithmetic number, because the mean of its divisors is an integer number (76386474).

Almost surely, 2^1000555555 is an apocalyptic number.

1000555555 is a deficient number, since it is larger than the sum of its proper divisors (221628029).

1000555555 is an equidigital number, since it uses as much as digits as its factorization.

1000555555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8886.

The product of its (nonzero) digits is 15625, while the sum is 31.

The square root of 1000555555 is about 31631.5594778380. The cubic root of 1000555555 is about 1000.1851507171.

The spelling of 1000555555 in words is "one billion, five hundred fifty-five thousand, five hundred fifty-five".