85663142651 has 2 divisors, whose sum is σ = 85663142652. Its totient is φ = 85663142650.

The previous prime is 85663142629. The next prime is 85663142689. The reversal of 85663142651 is 15624136658.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85663142651 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 85663142596 and 85663142605.

It is not a weakly prime, because it can be changed into another prime (85663142251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42831571325 + 42831571326.

It is an arithmetic number, because the mean of its divisors is an integer number (42831571326).

Almost surely, 2^85663142651 is an apocalyptic number.

85663142651 is a deficient number, since it is larger than the sum of its proper divisors (1).

85663142651 is an equidigital number, since it uses as much as digits as its factorization.

85663142651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 47.

The spelling of 85663142651 in words is "eighty-five billion, six hundred sixty-three million, one hundred forty-two thousand, six hundred fifty-one".