2013863597261 has 2 divisors, whose sum is σ = 2013863597262. Its totient is φ = 2013863597260.

The previous prime is 2013863597219. The next prime is 2013863597287. The reversal of 2013863597261 is 1627953683102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1266736744036 + 747126853225 = 1125494^2 + 864365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2013863597261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2013863597201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006931798630 + 1006931798631.

It is an arithmetic number, because the mean of its divisors is an integer number (1006931798631).

Almost surely, 2^{2013863597261} is an apocalyptic number.

It is an amenable number.

2013863597261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2013863597261 is an equidigital number, since it uses as much as digits as its factorization.

2013863597261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 2013863597261 in words is "two trillion, thirteen billion, eight hundred sixty-three million, five hundred ninety-seven thousand, two hundred sixty-one".