3813101561 has 2 divisors, whose sum is σ = 3813101562. Its totient is φ = 3813101560.

The previous prime is 3813101549. The next prime is 3813101597. The reversal of 3813101561 is 1651013183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2563903225 + 1249198336 = 50635^2 + 35344^2 .

It is a cyclic number.

It is not a de Polignac number, because 3813101561 - 2¹⁰ = 3813100537 is a prime.

It is not a weakly prime, because it can be changed into another prime (3813101261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1906550780 + 1906550781.

It is an arithmetic number, because the mean of its divisors is an integer number (1906550781).

Almost surely, 2^3813101561 is an apocalyptic number.

It is an amenable number.

3813101561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3813101561 is an equidigital number, since it uses as much as digits as its factorization.

3813101561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 3813101561 is about 61750.3162825908. The cubic root of 3813101561 is about 1562.2821027432.

The spelling of 3813101561 in words is "three billion, eight hundred thirteen million, one hundred one thousand, five hundred sixty-one".