3813263137781 has 2 divisors, whose sum is σ = 3813263137782. Its totient is φ = 3813263137780.

The previous prime is 3813263137753. The next prime is 3813263137799. The reversal of 3813263137781 is 1877313623183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3617448037681 + 195815100100 = 1901959^2 + 442510^2 .

It is a cyclic number.

It is not a de Polignac number, because 3813263137781 - 2²² = 3813258943477 is a prime.

It is a super-2 number, since 2×3813263137781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3813263134781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906631568890 + 1906631568891.

It is an arithmetic number, because the mean of its divisors is an integer number (1906631568891).

Almost surely, 2^{3813263137781} is an apocalyptic number.

It is an amenable number.

3813263137781 is a deficient number, since it is larger than the sum of its proper divisors (1).

3813263137781 is an equidigital number, since it uses as much as digits as its factorization.

3813263137781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 53.

The spelling of 3813263137781 in words is "three trillion, eight hundred thirteen billion, two hundred sixty-three million, one hundred thirty-seven thousand, seven hundred eighty-one".