6211961856 has 99 divisors (see below), whose sum is σ = 17958779293. Its totient is φ = 2068131840.

The previous prime is 6211961839. The next prime is 6211961869. The reversal of 6211961856 is 6581691126.

The square root of 6211961856 is 78816.

It is a perfect power (a square), and thus also a powerful number.

6211961856 is a `hidden beast` number, since 6 + 21 + 1 + 9 + 618 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1696121856 + 4515840000 = 41184^2 + 67200^2 .

It is a super-3 number, since 3×6211961856³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7565926 + ... + 7566746.

Almost surely, 2^6211961856 is an apocalyptic number.

6211961856 is the 78816-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6211961856

6211961856 is an abundant number, since it is smaller than the sum of its proper divisors (11746817437).

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

6211961856 is an frugal number, since it uses more digits than its factorization.

6211961856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668 (or 826 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The cubic root of 6211961856 is about 1838.2712433145.

The spelling of 6211961856 in words is "six billion, two hundred eleven million, nine hundred sixty-one thousand, eight hundred fifty-six".