79827505249 has 2 divisors, whose sum is σ = 79827505250. Its totient is φ = 79827505248.

The previous prime is 79827505213. The next prime is 79827505267. The reversal of 79827505249 is 94250572897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66151840000 + 13675665249 = 257200^2 + 116943^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79827505249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79827505193 and 79827505202.

It is not a weakly prime, because it can be changed into another prime (79827505049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39913752624 + 39913752625.

It is an arithmetic number, because the mean of its divisors is an integer number (39913752625).

Almost surely, 2^79827505249 is an apocalyptic number.

It is an amenable number.

79827505249 is a deficient number, since it is larger than the sum of its proper divisors (1).

79827505249 is an equidigital number, since it uses as much as digits as its factorization.

79827505249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 79827505249 in words is "seventy-nine billion, eight hundred twenty-seven million, five hundred five thousand, two hundred forty-nine".