861069352885 has 32 divisors (see below), whose sum is σ = 1250452961280. Its totient is φ = 555673823232.

The previous prime is 861069352883. The next prime is 861069352889. The reversal of 861069352885 is 588253960168.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 861069352885 - 2¹ = 861069352883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861069352883) 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, 9263721 + ... + 9356209.

It is an arithmetic number, because the mean of its divisors is an integer number (39076655040).

Almost surely, 2^861069352885 is an apocalyptic number.

861069352885 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

861069352885 is a deficient number, since it is larger than the sum of its proper divisors (389383608395).

861069352885 is a wasteful number, since it uses less digits than its factorization.

861069352885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108165.

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 861069352885 in words is "eight hundred sixty-one billion, sixty-nine million, three hundred fifty-two thousand, eight hundred eighty-five".