3156221725820 has 12 divisors (see below), whose sum is σ = 6628065624264. Its totient is φ = 1262488690320.

The previous prime is 3156221725759. The next prime is 3156221725837. The reversal of 3156221725820 is 285271226513.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78905543126 + ... + 78905543165.

It is an arithmetic number, because the mean of its divisors is an integer number (552338802022).

Almost surely, 2^{3156221725820} is an apocalyptic number.

It is an amenable number.

3156221725820 is an abundant number, since it is smaller than the sum of its proper divisors (3471843898444).

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

3156221725820 is a wasteful number, since it uses less digits than its factorization.

3156221725820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157811086300 (or 157811086298 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 3156221725820 in words is "three trillion, one hundred fifty-six billion, two hundred twenty-one million, seven hundred twenty-five thousand, eight hundred twenty".