861265648324 has 24 divisors (see below), whose sum is σ = 1524412060920. Its totient is φ = 425721010176.

The previous prime is 861265648249. The next prime is 861265648337. The reversal of 861265648324 is 423846562168.

861265648324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 442956802500 + 418308845824 = 665550^2 + 646768^2 .

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, 1894204 + ... + 2304460.

It is an arithmetic number, because the mean of its divisors is an integer number (63517169205).

Almost surely, 2^861265648324 is an apocalyptic number.

It is an amenable number.

861265648324 is a deficient number, since it is larger than the sum of its proper divisors (663146412596).

861265648324 is a wasteful number, since it uses less digits than its factorization.

861265648324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416247 (or 416245 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 55.

The spelling of 861265648324 in words is "eight hundred sixty-one billion, two hundred sixty-five million, six hundred forty-eight thousand, three hundred twenty-four".