647338932240 has 1280 divisors, whose sum is σ = 2945475477504. Its totient is φ = 113069260800.

The previous prime is 647338932211. The next prime is 647338932313. The reversal of 647338932240 is 42239833746.

It is a super-2 number, since 2×647338932240² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 126603924 + ... + 126609036.

Almost surely, 2^647338932240 is an apocalyptic number.

647338932240 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 647338932240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1472737738752).

647338932240 is an abundant number, since it is smaller than the sum of its proper divisors (2298136545264).

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

647338932240 is a wasteful number, since it uses less digits than its factorization.

647338932240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208 (or 5202 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 51.

The spelling of 647338932240 in words is "six hundred forty-seven billion, three hundred thirty-eight million, nine hundred thirty-two thousand, two hundred forty".