15915643603253 has 2 divisors, whose sum is σ = 15915643603254. Its totient is φ = 15915643603252.

The previous prime is 15915643603193. The next prime is 15915643603267. The reversal of 15915643603253 is 35230634651951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14204170020964 + 1711473582289 = 3768842^2 + 1308233^2 .

It is a cyclic number.

It is not a de Polignac number, because 15915643603253 - 2⁸ = 15915643602997 is a prime.

It is a super-2 number, since 2×15915643603253² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15915643603195 and 15915643603204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15915643603273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7957821801626 + 7957821801627.

It is an arithmetic number, because the mean of its divisors is an integer number (7957821801627).

Almost surely, 2^{15915643603253} is an apocalyptic number.

It is an amenable number.

15915643603253 is a deficient number, since it is larger than the sum of its proper divisors (1).

15915643603253 is an equidigital number, since it uses as much as digits as its factorization.

15915643603253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748000, while the sum is 53.

The spelling of 15915643603253 in words is "fifteen trillion, nine hundred fifteen billion, six hundred forty-three million, six hundred three thousand, two hundred fifty-three".