85025981659 has 2 divisors, whose sum is σ = 85025981660. Its totient is φ = 85025981658.

The previous prime is 85025981641. The next prime is 85025981767. The reversal of 85025981659 is 95618952058.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85025981659 - 2⁷ = 85025981531 is a prime.

It is not a weakly prime, because it can be changed into another prime (85025981609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42512990829 + 42512990830.

It is an arithmetic number, because the mean of its divisors is an integer number (42512990830).

Almost surely, 2^85025981659 is an apocalyptic number.

85025981659 is a deficient number, since it is larger than the sum of its proper divisors (1).

85025981659 is an equidigital number, since it uses as much as digits as its factorization.

85025981659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776000, while the sum is 58.

The spelling of 85025981659 in words is "eighty-five billion, twenty-five million, nine hundred eighty-one thousand, six hundred fifty-nine".