6861471556 has 27 divisors (see below), whose sum is σ = 12178393311. Its totient is φ = 3382609224.

The previous prime is 6861471523. The next prime is 6861471571. The reversal of 6861471556 is 6551741686.

The square root of 6861471556 is 82834.

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

It is a super-2 number, since 2×6861471556² = 94159583827594122272, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 13750195 + ... + 13750693.

Almost surely, 2^6861471556 is an apocalyptic number.

6861471556 is the 82834-th square number.

It is an amenable number.

6861471556 is a deficient number, since it is larger than the sum of its proper divisors (5316921755).

6861471556 is an frugal number, since it uses more digits than its factorization.

6861471556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168 (or 584 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The cubic root of 6861471556 is about 1900.2281864446.

Multiplying 6861471556 by its sum of digits (49), we get a square (336212106244 = 579838²).

The spelling of 6861471556 in words is "six billion, eight hundred sixty-one million, four hundred seventy-one thousand, five hundred fifty-six".