85528010977 has 2 divisors, whose sum is σ = 85528010978. Its totient is φ = 85528010976.

The previous prime is 85528010963. The next prime is 85528010993. The reversal of 85528010977 is 77901082558.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85474954321 + 53056656 = 292361^2 + 7284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85528010977 is a prime.

It is a super-3 number, since 3×85528010977³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (85528010177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42764005488 + 42764005489.

It is an arithmetic number, because the mean of its divisors is an integer number (42764005489).

Almost surely, 2^85528010977 is an apocalyptic number.

It is an amenable number.

85528010977 is a deficient number, since it is larger than the sum of its proper divisors (1).

85528010977 is an equidigital number, since it uses as much as digits as its factorization.

85528010977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1411200, while the sum is 52.

The spelling of 85528010977 in words is "eighty-five billion, five hundred twenty-eight million, ten thousand, nine hundred seventy-seven".