1005012641663 has 4 divisors (see below), whose sum is σ = 1005159816840. Its totient is φ = 1004865466488.

The previous prime is 1005012641651. The next prime is 1005012641719. The reversal of 1005012641663 is 3661462105001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005012641663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005012641603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73577345 + ... + 73591002.

It is an arithmetic number, because the mean of its divisors is an integer number (251289954210).

Almost surely, 2^{1005012641663} is an apocalyptic number.

1005012641663 is a deficient number, since it is larger than the sum of its proper divisors (147175177).

1005012641663 is an equidigital number, since it uses as much as digits as its factorization.

1005012641663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147175176.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 1005012641663 its reverse (3661462105001), we get a palindrome (4666474746664).

The spelling of 1005012641663 in words is "one trillion, five billion, twelve million, six hundred forty-one thousand, six hundred sixty-three".