3103091857561 has 2 divisors, whose sum is σ = 3103091857562. Its totient is φ = 3103091857560.

The previous prime is 3103091857553. The next prime is 3103091857631. The reversal of 3103091857561 is 1657581903013.

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., 3100219433536 + 2872424025 = 1760744^2 + 53595^2 .

It is a cyclic number.

It is not a de Polignac number, because 3103091857561 - 2³ = 3103091857553 is a prime.

It is a super-2 number, since 2×3103091857561² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3103091857511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1551545928780 + 1551545928781.

It is an arithmetic number, because the mean of its divisors is an integer number (1551545928781).

Almost surely, 2^{3103091857561} is an apocalyptic number.

It is an amenable number.

3103091857561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3103091857561 is an equidigital number, since it uses as much as digits as its factorization.

3103091857561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 3103091857561 in words is "three trillion, one hundred three billion, ninety-one million, eight hundred fifty-seven thousand, five hundred sixty-one".