2013022513661 has 2 divisors, whose sum is σ = 2013022513662. Its totient is φ = 2013022513660.

The previous prime is 2013022513657. The next prime is 2013022513679. The reversal of 2013022513661 is 1663152203102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1053271164100 + 959751349561 = 1026290^2 + 979669^2 .

It is a cyclic number.

It is not a de Polignac number, because 2013022513661 - 2² = 2013022513657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2013022513361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006511256830 + 1006511256831.

It is an arithmetic number, because the mean of its divisors is an integer number (1006511256831).

Almost surely, 2^{2013022513661} is an apocalyptic number.

It is an amenable number.

2013022513661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013022513661 is an equidigital number, since it uses as much as digits as its factorization.

2013022513661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 2013022513661 its reverse (1663152203102), we get a palindrome (3676174716763).

The spelling of 2013022513661 in words is "two trillion, thirteen billion, twenty-two million, five hundred thirteen thousand, six hundred sixty-one".