263615499197 has 2 divisors, whose sum is σ = 263615499198. Its totient is φ = 263615499196.

The previous prime is 263615499151. The next prime is 263615499229. The reversal of 263615499197 is 791994516362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246061634116 + 17553865081 = 496046^2 + 132491^2 .

It is a cyclic number.

It is not a de Polignac number, because 263615499197 - 2¹⁰ = 263615498173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263615499137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131807749598 + 131807749599.

It is an arithmetic number, because the mean of its divisors is an integer number (131807749599).

Almost surely, 2^263615499197 is an apocalyptic number.

It is an amenable number.

263615499197 is a deficient number, since it is larger than the sum of its proper divisors (1).

263615499197 is an equidigital number, since it uses as much as digits as its factorization.

263615499197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22044960, while the sum is 62.

The spelling of 263615499197 in words is "two hundred sixty-three billion, six hundred fifteen million, four hundred ninety-nine thousand, one hundred ninety-seven".