85811281203615 has 32 divisors (see below), whose sum is σ = 149780398233600. Its totient is φ = 41605273173120.

The previous prime is 85811281203577. The next prime is 85811281203619. The reversal of 85811281203615 is 51630218211858.

It is not a de Polignac number, because 85811281203615 - 2⁶ = 85811281203551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85811281203619) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37503666 + ... + 39725904.

It is an arithmetic number, because the mean of its divisors is an integer number (4680637444800).

Almost surely, 2^{85811281203615} is an apocalyptic number.

85811281203615 is a deficient number, since it is larger than the sum of its proper divisors (63969117029985).

85811281203615 is a wasteful number, since it uses less digits than its factorization.

85811281203615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456287.

The product of its (nonzero) digits is 921600, while the sum is 51.

The spelling of 85811281203615 in words is "eighty-five trillion, eight hundred eleven billion, two hundred eighty-one million, two hundred three thousand, six hundred fifteen".