861052186241 has 4 divisors (see below), whose sum is σ = 927286969812. Its totient is φ = 794817402672.

The previous prime is 861052186237. The next prime is 861052186249. The reversal of 861052186241 is 142681250168.

861052186241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 468074905600 + 392977280641 = 684160^2 + 626879^2 .

It is a cyclic number.

It is not a de Polignac number, because 861052186241 - 2² = 861052186237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861052186192 and 861052186201.

It is not an unprimeable number, because it can be changed into a prime (861052186249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33117391766 + ... + 33117391791.

It is an arithmetic number, because the mean of its divisors is an integer number (231821742453).

Almost surely, 2^861052186241 is an apocalyptic number.

It is an amenable number.

861052186241 is a deficient number, since it is larger than the sum of its proper divisors (66234783571).

861052186241 is a wasteful number, since it uses less digits than its factorization.

861052186241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66234783570.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 861052186241 in words is "eight hundred sixty-one billion, fifty-two million, one hundred eighty-six thousand, two hundred forty-one".