1361556263 has 2 divisors, whose sum is σ = 1361556264. Its totient is φ = 1361556262.

The previous prime is 1361556233. The next prime is 1361556269. The reversal of 1361556263 is 3626551631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1361556263 - 2⁶ = 1361556199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361556269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 680778131 + 680778132.

It is an arithmetic number, because the mean of its divisors is an integer number (680778132).

Almost surely, 2^1361556263 is an apocalyptic number.

1361556263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361556263 is an equidigital number, since it uses as much as digits as its factorization.

1361556263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97200, while the sum is 38.

The square root of 1361556263 is about 36899.2718491842. The cubic root of 1361556263 is about 1108.3540963918.

The spelling of 1361556263 in words is "one billion, three hundred sixty-one million, five hundred fifty-six thousand, two hundred sixty-three".