861130777866612 has 24 divisors (see below), whose sum is σ = 2191969252751712. Its totient is φ = 260948720565600.

The previous prime is 861130777866523. The next prime is 861130777866629. The reversal of 861130777866612 is 216668777031168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3261859006939 + ... + 3261859007202.

It is an arithmetic number, because the mean of its divisors is an integer number (91332052197988).

Almost surely, 2^{861130777866612} is an apocalyptic number.

It is an amenable number.

861130777866612 is an abundant number, since it is smaller than the sum of its proper divisors (1330838474885100).

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

861130777866612 is a wasteful number, since it uses less digits than its factorization.

861130777866612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6523718014159 (or 6523718014157 counting only the distinct ones).

The product of its (nonzero) digits is 170698752, while the sum is 69.

The spelling of 861130777866612 in words is "eight hundred sixty-one trillion, one hundred thirty billion, seven hundred seventy-seven million, eight hundred sixty-six thousand, six hundred twelve".