70785258517 has 2 divisors, whose sum is σ = 70785258518. Its totient is φ = 70785258516.

The previous prime is 70785258473. The next prime is 70785258527. The reversal of 70785258517 is 71585258707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56650664196 + 14134594321 = 238014^2 + 118889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70785258517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70785258527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35392629258 + 35392629259.

It is an arithmetic number, because the mean of its divisors is an integer number (35392629259).

Almost surely, 2^70785258517 is an apocalyptic number.

It is an amenable number.

70785258517 is a deficient number, since it is larger than the sum of its proper divisors (1).

70785258517 is an equidigital number, since it uses as much as digits as its factorization.

70785258517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5488000, while the sum is 55.

The spelling of 70785258517 in words is "seventy billion, seven hundred eighty-five million, two hundred fifty-eight thousand, five hundred seventeen".