861322029396 has 24 divisors (see below), whose sum is σ = 2019850660800. Its totient is φ = 285664591872.

The previous prime is 861322029377. The next prime is 861322029431. The reversal of 861322029396 is 693920223168.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 180341421 + ... + 180346196.

It is an arithmetic number, because the mean of its divisors is an integer number (84160444200).

Almost surely, 2^861322029396 is an apocalyptic number.

It is an amenable number.

861322029396 is an abundant number, since it is smaller than the sum of its proper divisors (1158528631404).

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

861322029396 is a wasteful number, since it uses less digits than its factorization.

861322029396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360687823 (or 360687821 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 861322029396 in words is "eight hundred sixty-one billion, three hundred twenty-two million, twenty-nine thousand, three hundred ninety-six".