16531361263 has 2 divisors, whose sum is σ = 16531361264. Its totient is φ = 16531361262.

The previous prime is 16531361237. The next prime is 16531361279. The reversal of 16531361263 is 36216313561.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16531361263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16531361963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8265680631 + 8265680632.

It is an arithmetic number, because the mean of its divisors is an integer number (8265680632).

Almost surely, 2^16531361263 is an apocalyptic number.

16531361263 is a deficient number, since it is larger than the sum of its proper divisors (1).

16531361263 is an equidigital number, since it uses as much as digits as its factorization.

16531361263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 37.

It can be divided in two parts, 165313 and 61263, that added together give a square (226576 = 476²).

The spelling of 16531361263 in words is "sixteen billion, five hundred thirty-one million, three hundred sixty-one thousand, two hundred sixty-three".