85259451861 has 6 divisors (see below), whose sum is σ = 123152541590. Its totient is φ = 56839634568.

The previous prime is 85259451839. The next prime is 85259451919. The reversal of 85259451861 is 16815495258.

85259451861 is a `hidden beast` number, since 8 + 525 + 9 + 4 + 51 + 8 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 85209112836 + 50339025 = 291906^2 + 7095^2 .

It is not a de Polignac number, because 85259451861 - 2¹¹ = 85259449813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85259451798 and 85259451807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85259455861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4736636206 + ... + 4736636223.

Almost surely, 2^85259451861 is an apocalyptic number.

It is an amenable number.

85259451861 is a deficient number, since it is larger than the sum of its proper divisors (37893089729).

85259451861 is a wasteful number, since it uses less digits than its factorization.

85259451861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9473272435 (or 9473272432 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 54.

The spelling of 85259451861 in words is "eighty-five billion, two hundred fifty-nine million, four hundred fifty-one thousand, eight hundred sixty-one".