647795880000 has 1400 divisors, whose sum is σ = 2678763146400. Its totient is φ = 153778176000.

The previous prime is 647795879999. The next prime is 647795880001. The reversal of 647795880000 is 88597746.

647795880000 is a `hidden beast` number, since 6 + 477 + 95 + 8 + 80 + 0 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (647795879999) and next prime (647795880001).

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

It is not an unprimeable number, because it can be changed into a prime (647795880001) by changing a digit.

It is a polite number, since it can be written in 199 ways as a sum of consecutive naturals, for example, 1046519691 + ... + 1046520309.

Almost surely, 2^647795880000 is an apocalyptic number.

647795880000 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 647795880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339381573200).

647795880000 is an abundant number, since it is smaller than the sum of its proper divisors (2030967266400).

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

647795880000 is a wasteful number, since it uses less digits than its factorization.

647795880000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The spelling of 647795880000 in words is "six hundred forty-seven billion, seven hundred ninety-five million, eight hundred eighty thousand".