85641723870 has 16 divisors (see below), whose sum is σ = 205540137360. Its totient is φ = 22837793024.

The previous prime is 85641723857. The next prime is 85641723877. The reversal of 85641723870 is 7832714658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85641723877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427362035 + ... + 1427362094.

It is an arithmetic number, because the mean of its divisors is an integer number (12846258585).

Almost surely, 2^85641723870 is an apocalyptic number.

85641723870 is an abundant number, since it is smaller than the sum of its proper divisors (119898413490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85641723870 is a wasteful number, since it uses less digits than its factorization.

85641723870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2854724139.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 85641723870 in words is "eighty-five billion, six hundred forty-one million, seven hundred twenty-three thousand, eight hundred seventy".