85885910781 has 16 divisors (see below), whose sum is σ = 128954800128. Its totient is φ = 50372967600.

The previous prime is 85885910779. The next prime is 85885910801. The reversal of 85885910781 is 18701958858.

It is not a de Polignac number, because 85885910781 - 2¹ = 85885910779 is a prime.

It is a super-2 number, since 2×85885910781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85885910701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41976451 + ... + 41978496.

It is an arithmetic number, because the mean of its divisors is an integer number (8059675008).

Almost surely, 2^85885910781 is an apocalyptic number.

It is an amenable number.

85885910781 is a deficient number, since it is larger than the sum of its proper divisors (43068889347).

85885910781 is a wasteful number, since it uses less digits than its factorization.

85885910781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83954992.

The product of its (nonzero) digits is 6451200, while the sum is 60.

The spelling of 85885910781 in words is "eighty-five billion, eight hundred eighty-five million, nine hundred ten thousand, seven hundred eighty-one".