647694460080 has 360 divisors, whose sum is σ = 2261173858944. Its totient is φ = 165973708800.

The previous prime is 647694460073. The next prime is 647694460129. The reversal of 647694460080 is 80064496746.

647694460080 is a `hidden beast` number, since 6 + 47 + 69 + 4 + 460 + 0 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×647694460080² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 647694459999 and 647694460026.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1866554467 + ... + 1866554813.

Almost surely, 2^647694460080 is an apocalyptic number.

647694460080 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 647694460080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130586929472).

647694460080 is an abundant number, since it is smaller than the sum of its proper divisors (1613479398864).

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

647694460080 is a wasteful number, since it uses less digits than its factorization.

647694460080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 647694460080 in words is "six hundred forty-seven billion, six hundred ninety-four million, four hundred sixty thousand, eighty".