10785211517 has 2 divisors, whose sum is σ = 10785211518. Its totient is φ = 10785211516.

The previous prime is 10785211501. The next prime is 10785211531. The reversal of 10785211517 is 71511258701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10769043076 + 16168441 = 103774^2 + 4021^2 .

It is a cyclic number.

It is not a de Polignac number, because 10785211517 - 2⁴ = 10785211501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10785211537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5392605758 + 5392605759.

It is an arithmetic number, because the mean of its divisors is an integer number (5392605759).

Almost surely, 2^10785211517 is an apocalyptic number.

It is an amenable number.

10785211517 is a deficient number, since it is larger than the sum of its proper divisors (1).

10785211517 is an equidigital number, since it uses as much as digits as its factorization.

10785211517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19600, while the sum is 38.

The spelling of 10785211517 in words is "ten billion, seven hundred eighty-five million, two hundred eleven thousand, five hundred seventeen".