170986670851 has 2 divisors, whose sum is σ = 170986670852. Its totient is φ = 170986670850.

The previous prime is 170986670809. The next prime is 170986670857. The reversal of 170986670851 is 158076689071.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170986670851 is a prime.

It is not a weakly prime, because it can be changed into another prime (170986670857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85493335425 + 85493335426.

It is an arithmetic number, because the mean of its divisors is an integer number (85493335426).

Almost surely, 2^170986670851 is an apocalyptic number.

170986670851 is a deficient number, since it is larger than the sum of its proper divisors (1).

170986670851 is an equidigital number, since it uses as much as digits as its factorization.

170986670851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 170986670851 in words is "one hundred seventy billion, nine hundred eighty-six million, six hundred seventy thousand, eight hundred fifty-one".