6551859363840 has 1840 divisors, whose sum is σ = 29232617673600. Its totient is φ = 1369826131968.

The previous prime is 6551859363839. The next prime is 6551859363901. The reversal of 6551859363840 is 483639581556.

It is a happy number.

6551859363840 is a `hidden beast` number, since 6 + 5 + 5 + 1 + 8 + 593 + 6 + 38 + 4 + 0 = 666.

It is a super-2 number, since 2×6551859363840² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 225926184946 + ... + 225926184974.

Almost surely, 2^{6551859363840} is an apocalyptic number.

6551859363840 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 6551859363840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14616308836800).

6551859363840 is an abundant number, since it is smaller than the sum of its proper divisors (22680758309760).

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

6551859363840 is an frugal number, since it uses more digits than its factorization.

6551859363840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 93312000, while the sum is 63.

The spelling of 6551859363840 in words is "six trillion, five hundred fifty-one billion, eight hundred fifty-nine million, three hundred sixty-three thousand, eight hundred forty".