861021494232 has 32 divisors (see below), whose sum is σ = 2189037700800. Its totient is φ = 282142636064.

The previous prime is 861021494219. The next prime is 861021494287. The reversal of 861021494232 is 232494120168.

It is a happy number.

861021494232 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 304031598 + ... + 304034429.

It is an arithmetic number, because the mean of its divisors is an integer number (68407428150).

Almost surely, 2^861021494232 is an apocalyptic number.

It is an amenable number.

861021494232 is an abundant number, since it is smaller than the sum of its proper divisors (1328016206568).

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

861021494232 is a wasteful number, since it uses less digits than its factorization.

861021494232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608066095 (or 608066091 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 861021494232 in words is "eight hundred sixty-one billion, twenty-one million, four hundred ninety-four thousand, two hundred thirty-two".