647119547540 has 24 divisors (see below), whose sum is σ = 1359105200712. Its totient is φ = 258818456960.

The previous prime is 647119547527. The next prime is 647119547549. The reversal of 647119547540 is 45745911746.

It can be written as a sum of positive squares in 4 ways, for example, as 192557726596 + 454561820944 = 438814^2 + 674212^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647119547549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653971 + ... + 2007450.

It is an arithmetic number, because the mean of its divisors is an integer number (56629383363).

Almost surely, 2^647119547540 is an apocalyptic number.

It is an amenable number.

647119547540 is an abundant number, since it is smaller than the sum of its proper divisors (711985653172).

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

647119547540 is a wasteful number, since it uses less digits than its factorization.

647119547540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670267 (or 3670265 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 647119547540 in words is "six hundred forty-seven billion, one hundred nineteen million, five hundred forty-seven thousand, five hundred forty".