85080155977 has 2 divisors, whose sum is σ = 85080155978. Its totient is φ = 85080155976.

The previous prime is 85080155959. The next prime is 85080155981. The reversal of 85080155977 is 77955108058.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81108761616 + 3971394361 = 284796^2 + 63019^2 .

It is a cyclic number.

It is not a de Polignac number, because 85080155977 - 2¹⁵ = 85080123209 is a prime.

It is not a weakly prime, because it can be changed into another prime (85080155947) 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, 42540077988 + 42540077989.

It is an arithmetic number, because the mean of its divisors is an integer number (42540077989).

Almost surely, 2^85080155977 is an apocalyptic number.

It is an amenable number.

85080155977 is a deficient number, since it is larger than the sum of its proper divisors (1).

85080155977 is an equidigital number, since it uses as much as digits as its factorization.

85080155977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528000, while the sum is 55.

The spelling of 85080155977 in words is "eighty-five billion, eighty million, one hundred fifty-five thousand, nine hundred seventy-seven".