1011663642013 has 4 divisors (see below), whose sum is σ = 1012104072540. Its totient is φ = 1011223211488.

The previous prime is 1011663642007. The next prime is 1011663642113. The reversal of 1011663642013 is 3102463661101.

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 353355346969 + 658308295044 = 594437^2 + 811362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011663642013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1011663642013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011663642113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220211818 + ... + 220216411.

It is an arithmetic number, because the mean of its divisors is an integer number (253026018135).

Almost surely, 2^{1011663642013} is an apocalyptic number.

It is an amenable number.

1011663642013 is a deficient number, since it is larger than the sum of its proper divisors (440430527).

1011663642013 is an equidigital number, since it uses as much as digits as its factorization.

1011663642013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440430526.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 1011663642013 in words is "one trillion, eleven billion, six hundred sixty-three million, six hundred forty-two thousand, thirteen".