1356561911 has 2 divisors, whose sum is σ = 1356561912. Its totient is φ = 1356561910.

The previous prime is 1356561887. The next prime is 1356561923. The reversal of 1356561911 is 1191656531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1356561911 - 2²² = 1352367607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1356563911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 678280955 + 678280956.

It is an arithmetic number, because the mean of its divisors is an integer number (678280956).

Almost surely, 2^1356561911 is an apocalyptic number.

1356561911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1356561911 is an equidigital number, since it uses as much as digits as its factorization.

1356561911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 38.

The square root of 1356561911 is about 36831.5341928625. The cubic root of 1356561911 is about 1106.9972439965.

The spelling of 1356561911 in words is "one billion, three hundred fifty-six million, five hundred sixty-one thousand, nine hundred eleven".