861016770 has 32 divisors (see below), whose sum is σ = 2296045440. Its totient is φ = 229604400.

The previous prime is 861016733. The next prime is 861016771. The reversal of 861016770 is 77610168.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (861016771) 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, 1594206 + ... + 1594745.

It is an arithmetic number, because the mean of its divisors is an integer number (71751420).

Almost surely, 2^861016770 is an apocalyptic number.

861016770 is an abundant number, since it is smaller than the sum of its proper divisors (1435028670).

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

861016770 is a wasteful number, since it uses less digits than its factorization.

861016770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188967 (or 3188961 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 861016770 is about 29343.0872608865. The cubic root of 861016770 is about 951.3431674590.

The spelling of 861016770 in words is "eight hundred sixty-one million, sixteen thousand, seven hundred seventy".