1561363127 has 2 divisors, whose sum is σ = 1561363128. Its totient is φ = 1561363126.

The previous prime is 1561363123. The next prime is 1561363163. The reversal of 1561363127 is 7213631651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1561363127 - 2² = 1561363123 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1561363123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780681563 + 780681564.

It is an arithmetic number, because the mean of its divisors is an integer number (780681564).

Almost surely, 2^1561363127 is an apocalyptic number.

1561363127 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561363127 is an equidigital number, since it uses as much as digits as its factorization.

1561363127 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 1561363127 is about 39514.0877029952. The cubic root of 1561363127 is about 1160.1157056106.

Adding to 1561363127 its reverse (7213631651), we get a palindrome (8774994778).

The spelling of 1561363127 in words is "one billion, five hundred sixty-one million, three hundred sixty-three thousand, one hundred twenty-seven".