1561773053 has 2 divisors, whose sum is σ = 1561773054. Its totient is φ = 1561773052.

The previous prime is 1561772981. The next prime is 1561773061. The reversal of 1561773053 is 3503771651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1456032964 + 105740089 = 38158^2 + 10283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1561773053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1561772998 and 1561773016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1561770053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780886526 + 780886527.

It is an arithmetic number, because the mean of its divisors is an integer number (780886527).

Almost surely, 2^1561773053 is an apocalyptic number.

It is an amenable number.

1561773053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561773053 is an equidigital number, since it uses as much as digits as its factorization.

1561773053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 1561773053 is about 39519.2744493114. The cubic root of 1561773053 is about 1160.2172237371.

The spelling of 1561773053 in words is "one billion, five hundred sixty-one million, seven hundred seventy-three thousand, fifty-three".