861033845 has 16 divisors (see below), whose sum is σ = 1212763008. Its totient is φ = 574464960.

The previous prime is 861033841. The next prime is 861033863. The reversal of 861033845 is 548330168.

It is not a de Polignac number, because 861033845 - 2² = 861033841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861033799 and 861033808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861033841) 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, 331151 + ... + 333740.

It is an arithmetic number, because the mean of its divisors is an integer number (75797688).

Almost surely, 2^861033845 is an apocalyptic number.

It is an amenable number.

861033845 is a deficient number, since it is larger than the sum of its proper divisors (351729163).

861033845 is a wasteful number, since it uses less digits than its factorization.

861033845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664940.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 861033845 is about 29343.3782138322. The cubic root of 861033845 is about 951.3494561778.

The spelling of 861033845 in words is "eight hundred sixty-one million, thirty-three thousand, eight hundred forty-five".