861362631100 has 36 divisors (see below), whose sum is σ = 1869912052344. Its totient is φ = 344405855680.

The previous prime is 861362631067. The next prime is 861362631149. The reversal of 861362631100 is 1136263168.

861362631100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 861362631100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1491022 + ... + 1986421.

It is an arithmetic number, because the mean of its divisors is an integer number (51942001454).

Almost surely, 2^861362631100 is an apocalyptic number.

It is an amenable number.

861362631100 is an abundant number, since it is smaller than the sum of its proper divisors (1008549421244).

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

861362631100 is a wasteful number, since it uses less digits than its factorization.

861362631100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3479934 (or 3479927 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

Adding to 861362631100 its reverse (1136263168), we get a palindrome (862498894268).

The spelling of 861362631100 in words is "eight hundred sixty-one billion, three hundred sixty-two million, six hundred thirty-one thousand, one hundred".