1005255451555 has 4 divisors (see below), whose sum is σ = 1206306541872. Its totient is φ = 804204361240.

The previous prime is 1005255451537. The next prime is 1005255451601. The reversal of 1005255451555 is 5551545525001.

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

It is not a de Polignac number, because 1005255451555 - 2²⁷ = 1005121233827 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100525545151 + ... + 100525545160.

It is an arithmetic number, because the mean of its divisors is an integer number (301576635468).

Almost surely, 2^{1005255451555} is an apocalyptic number.

1005255451555 is a deficient number, since it is larger than the sum of its proper divisors (201051090317).

1005255451555 is an equidigital number, since it uses as much as digits as its factorization.

1005255451555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201051090316.

The product of its (nonzero) digits is 625000, while the sum is 43.

The spelling of 1005255451555 in words is "one trillion, five billion, two hundred fifty-five million, four hundred fifty-one thousand, five hundred fifty-five".