1005555248465 has 4 divisors (see below), whose sum is σ = 1206666298164. Its totient is φ = 804444198768.

The previous prime is 1005555248437. The next prime is 1005555248491. The reversal of 1005555248465 is 5648425555001.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 802686981184 + 202868267281 = 895928^2 + 450409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005555248465 is a prime.

It is a super-2 number, since 2×1005555248465² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon 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, 100555524842 + ... + 100555524851.

It is an arithmetic number, because the mean of its divisors is an integer number (301666574541).

Almost surely, 2^{1005555248465} is an apocalyptic number.

It is an amenable number.

1005555248465 is a deficient number, since it is larger than the sum of its proper divisors (201111049699).

1005555248465 is an equidigital number, since it uses as much as digits as its factorization.

1005555248465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201111049698.

The product of its (nonzero) digits is 4800000, while the sum is 50.

The spelling of 1005555248465 in words is "one trillion, five billion, five hundred fifty-five million, two hundred forty-eight thousand, four hundred sixty-five".