1561367411 has 2 divisors, whose sum is σ = 1561367412. Its totient is φ = 1561367410.

The previous prime is 1561367393. The next prime is 1561367419. The reversal of 1561367411 is 1147631651.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1561367411 - 2⁶ = 1561367347 is a prime.

It is not a weakly prime, because it can be changed into another prime (1561367419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780683705 + 780683706.

It is an arithmetic number, because the mean of its divisors is an integer number (780683706).

Almost surely, 2^1561367411 is an apocalyptic number.

1561367411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1561367411 is an equidigital number, since it uses as much as digits as its factorization.

1561367411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 35.

The square root of 1561367411 is about 39514.1419114727. The cubic root of 1561367411 is about 1160.1167666346.

The spelling of 1561367411 in words is "one billion, five hundred sixty-one million, three hundred sixty-seven thousand, four hundred eleven".