647670965760 has 960 divisors, whose sum is σ = 2787463590912. Its totient is φ = 135327449088.

The previous prime is 647670965731. The next prime is 647670965779. The reversal of 647670965760 is 67569076746.

647670965760 is a `hidden beast` number, since 6 + 476 + 7 + 0 + 96 + 5 + 76 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

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 95 ways as a sum of consecutive naturals, for example, 224339037 + ... + 224341923.

Almost surely, 2^647670965760 is an apocalyptic number.

647670965760 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 647670965760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1393731795456).

647670965760 is an abundant number, since it is smaller than the sum of its proper divisors (2139792625152).

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

647670965760 is a wasteful number, since it uses less digits than its factorization.

647670965760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043 (or 3024 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 63.

The spelling of 647670965760 in words is "six hundred forty-seven billion, six hundred seventy million, nine hundred sixty-five thousand, seven hundred sixty".