85811260378055 has 4 divisors (see below), whose sum is σ = 102973512453672. Its totient is φ = 68649008302440.

The previous prime is 85811260378009. The next prime is 85811260378061. The reversal of 85811260378055 is 55087306211858.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-85811260378055 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85811260377985 and 85811260378003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8581126037801 + ... + 8581126037810.

It is an arithmetic number, because the mean of its divisors is an integer number (25743378113418).

Almost surely, 2^{85811260378055} is an apocalyptic number.

85811260378055 is a deficient number, since it is larger than the sum of its proper divisors (17162252075617).

85811260378055 is a wasteful number, since it uses less digits than its factorization.

85811260378055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17162252075616.

The product of its (nonzero) digits is 16128000, while the sum is 59.

The spelling of 85811260378055 in words is "eighty-five trillion, eight hundred eleven billion, two hundred sixty million, three hundred seventy-eight thousand, fifty-five".