647045066240 has 80 divisors (see below), whose sum is σ = 1587470792688. Its totient is φ = 252798959616.

The previous prime is 647045066233. The next prime is 647045066249. The reversal of 647045066240 is 42660540746.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 647045066191 and 647045066200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647045066249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2828897 + ... + 3049056.

Almost surely, 2^647045066240 is an apocalyptic number.

It is an amenable number.

647045066240 is an abundant number, since it is smaller than the sum of its proper divisors (940425726448).

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

647045066240 is an equidigital number, since it uses as much as digits as its factorization.

647045066240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5878019 (or 5878003 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 44.

The spelling of 647045066240 in words is "six hundred forty-seven billion, forty-five million, sixty-six thousand, two hundred forty".