861580476601 has 6 divisors (see below), whose sum is σ = 932954007390. Its totient is φ = 795305055168.

The previous prime is 861580476557. The next prime is 861580476611. The reversal of 861580476601 is 106674085168.

It can be written as a sum of positive squares in 3 ways, for example, as 28814723001 + 832765753600 = 169749^2 + 912560^2 .

It is not a de Polignac number, because 861580476601 - 2¹¹ = 861580474553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861580476611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2549054496 + ... + 2549054833.

It is an arithmetic number, because the mean of its divisors is an integer number (155492334565).

Almost surely, 2^861580476601 is an apocalyptic number.

It is an amenable number.

861580476601 is a deficient number, since it is larger than the sum of its proper divisors (71373530789).

861580476601 is a wasteful number, since it uses less digits than its factorization.

861580476601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098109355 (or 5098109342 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 861580476601 in words is "eight hundred sixty-one billion, five hundred eighty million, four hundred seventy-six thousand, six hundred one".