6861497472 has 128 divisors (see below), whose sum is σ = 20330640000. Its totient is φ = 2278167552.

The previous prime is 6861497413. The next prime is 6861497497. The reversal of 6861497472 is 2747941686.

6861497472 is a `hidden beast` number, since 6 + 86 + 1 + 4 + 97 + 472 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905154 + ... + 912702.

It is an arithmetic number, because the mean of its divisors is an integer number (158833125).

Almost surely, 2^6861497472 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 6861497472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10165320000).

6861497472 is an abundant number, since it is smaller than the sum of its proper divisors (13469142528).

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

6861497472 is a wasteful number, since it uses less digits than its factorization.

6861497472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7835 (or 7817 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 6861497472 is about 82834.1564332009. The cubic root of 6861497472 is about 1900.2305788493.

The spelling of 6861497472 in words is "six billion, eight hundred sixty-one million, four hundred ninety-seven thousand, four hundred seventy-two".