85161310879 has 2 divisors, whose sum is σ = 85161310880. Its totient is φ = 85161310878.

The previous prime is 85161310877. The next prime is 85161310903. The reversal of 85161310879 is 97801316158.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85161310879 - 2¹ = 85161310877 is a prime.

Together with 85161310877, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85161310873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42580655439 + 42580655440.

It is an arithmetic number, because the mean of its divisors is an integer number (42580655440).

Almost surely, 2^85161310879 is an apocalyptic number.

85161310879 is a deficient number, since it is larger than the sum of its proper divisors (1).

85161310879 is an equidigital number, since it uses as much as digits as its factorization.

85161310879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 49.

The spelling of 85161310879 in words is "eighty-five billion, one hundred sixty-one million, three hundred ten thousand, eight hundred seventy-nine".