3211388300856 has 128 divisors (see below), whose sum is σ = 8651635142400. Its totient is φ = 989636720640.

The previous prime is 3211388300803. The next prime is 3211388300863. The reversal of 3211388300856 is 6580038831123.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30832386 + ... + 30936366.

It is an arithmetic number, because the mean of its divisors is an integer number (67590899550).

Almost surely, 2^{3211388300856} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3211388300856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4325817571200).

3211388300856 is an abundant number, since it is smaller than the sum of its proper divisors (5440246841544).

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

3211388300856 is a wasteful number, since it uses less digits than its factorization.

3211388300856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105349 (or 105345 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 3211388300856 in words is "three trillion, two hundred eleven billion, three hundred eighty-eight million, three hundred thousand, eight hundred fifty-six".