5561491830157 has 2 divisors, whose sum is σ = 5561491830158. Its totient is φ = 5561491830156.

The previous prime is 5561491830151. The next prime is 5561491830203. The reversal of 5561491830157 is 7510381941655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5425680417481 + 135811412676 = 2329309^2 + 368526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5561491830157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5561491830098 and 5561491830107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5561491830151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780745915078 + 2780745915079.

It is an arithmetic number, because the mean of its divisors is an integer number (2780745915079).

Almost surely, 2^{5561491830157} is an apocalyptic number.

It is an amenable number.

5561491830157 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561491830157 is an equidigital number, since it uses as much as digits as its factorization.

5561491830157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536000, while the sum is 55.

The spelling of 5561491830157 in words is "five trillion, five hundred sixty-one billion, four hundred ninety-one million, eight hundred thirty thousand, one hundred fifty-seven".