6861803520 has 624 divisors, whose sum is σ = 26354837376. Its totient is φ = 1513881600.

The previous prime is 6861803519. The next prime is 6861803537. The reversal of 6861803520 is 253081686.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (624).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96645085 + ... + 96645155.

Almost surely, 2^6861803520 is an apocalyptic number.

6861803520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6861803520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13177418688).

6861803520 is an abundant number, since it is smaller than the sum of its proper divisors (19493033856).

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

6861803520 is a wasteful number, since it uses less digits than its factorization.

6861803520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 6861803520 is about 82836.0037664783. The cubic root of 6861803520 is about 1900.2588308514.

The spelling of 6861803520 in words is "six billion, eight hundred sixty-one million, eight hundred three thousand, five hundred twenty".