79884753257 has 2 divisors, whose sum is σ = 79884753258. Its totient is φ = 79884753256.

The previous prime is 79884753217. The next prime is 79884753313. The reversal of 79884753257 is 75235748897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60582930496 + 19301822761 = 246136^2 + 138931^2 .

It is a cyclic number.

It is not a de Polignac number, because 79884753257 - 2³² = 75589785961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79884753193 and 79884753202.

It is not a weakly prime, because it can be changed into another prime (79884753217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39942376628 + 39942376629.

It is an arithmetic number, because the mean of its divisors is an integer number (39942376629).

Almost surely, 2^79884753257 is an apocalyptic number.

It is an amenable number.

79884753257 is a deficient number, since it is larger than the sum of its proper divisors (1).

79884753257 is an equidigital number, since it uses as much as digits as its factorization.

79884753257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118540800, while the sum is 65.

The spelling of 79884753257 in words is "seventy-nine billion, eight hundred eighty-four million, seven hundred fifty-three thousand, two hundred fifty-seven".