861305833377 has 16 divisors (see below), whose sum is σ = 1392009428160. Its totient is φ = 522003535200.

The previous prime is 861305833361. The next prime is 861305833403. The reversal of 861305833377 is 773338503168.

It is not a de Polignac number, because 861305833377 - 2⁴ = 861305833361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (861305838377) 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, 1450009524 + ... + 1450010117.

It is an arithmetic number, because the mean of its divisors is an integer number (87000589260).

Almost surely, 2^861305833377 is an apocalyptic number.

It is an amenable number.

861305833377 is a deficient number, since it is larger than the sum of its proper divisors (530703594783).

861305833377 is a wasteful number, since it uses less digits than its factorization.

861305833377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900019661 (or 2900019655 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 861305833377 in words is "eight hundred sixty-one billion, three hundred five million, eight hundred thirty-three thousand, three hundred seventy-seven".