1000555055551 has 2 divisors, whose sum is σ = 1000555055552. Its totient is φ = 1000555055550.

The previous prime is 1000555055531. The next prime is 1000555055561. The reversal of 1000555055551 is 1555505550001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1000555055551 - 2⁵ = 1000555055519 is a prime.

It is a super-2 number, since 2×1000555055551² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1000555055551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000555055531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500277527775 + 500277527776.

It is an arithmetic number, because the mean of its divisors is an integer number (500277527776).

Almost surely, 2^{1000555055551} is an apocalyptic number.

1000555055551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000555055551 is an equidigital number, since it uses as much as digits as its factorization.

1000555055551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78125, while the sum is 37.

The spelling of 1000555055551 in words is "one trillion, five hundred fifty-five million, fifty-five thousand, five hundred fifty-one".