85625738377 has 2 divisors, whose sum is σ = 85625738378. Its totient is φ = 85625738376.

The previous prime is 85625738323. The next prime is 85625738411. The reversal of 85625738377 is 77383752658.

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., 85438705401 + 187032976 = 292299^2 + 13676^2 .

It is a cyclic number.

It is not a de Polignac number, because 85625738377 - 2¹⁹ = 85625214089 is a prime.

It is not a weakly prime, because it can be changed into another prime (85625739377) 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, 42812869188 + 42812869189.

It is an arithmetic number, because the mean of its divisors is an integer number (42812869189).

Almost surely, 2^85625738377 is an apocalyptic number.

It is an amenable number.

85625738377 is a deficient number, since it is larger than the sum of its proper divisors (1).

85625738377 is an equidigital number, since it uses as much as digits as its factorization.

85625738377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59270400, while the sum is 61.

The spelling of 85625738377 in words is "eighty-five billion, six hundred twenty-five million, seven hundred thirty-eight thousand, three hundred seventy-seven".