7643240647 has 48 divisors (see below), whose sum is σ = 9618134400. Its totient is φ = 6033484800.

The previous prime is 7643240629. The next prime is 7643240659. The reversal of 7643240647 is 7460423467.

It is not a de Polignac number, because 7643240647 - 2⁷ = 7643240519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7643240687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17733522 + ... + 17733952.

It is an arithmetic number, because the mean of its divisors is an integer number (200377800).

Almost surely, 2^7643240647 is an apocalyptic number.

7643240647 is a deficient number, since it is larger than the sum of its proper divisors (1974893753).

7643240647 is a wasteful number, since it uses less digits than its factorization.

7643240647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 865 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 43.

The square root of 7643240647 is about 87425.6292342240. The cubic root of 7643240647 is about 1969.8168336147.

The spelling of 7643240647 in words is "seven billion, six hundred forty-three million, two hundred forty thousand, six hundred forty-seven".