7975670643 has 16 divisors (see below), whose sum is σ = 11819072160. Its totient is φ = 5315645088.

The previous prime is 7975670587. The next prime is 7975670711. The reversal of 7975670643 is 3460765797.

7975670643 is a `hidden beast` number, since 79 + 7 + 567 + 0 + 6 + 4 + 3 = 666.

It is not a de Polignac number, because 7975670643 - 2¹² = 7975666547 is a prime.

It is a super-2 number, since 2×7975670643² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7975670643.

It is not an unprimeable number, because it can be changed into a prime (7975670543) 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 15 ways as a sum of consecutive naturals, for example, 63621 + ... + 141417.

It is an arithmetic number, because the mean of its divisors is an integer number (738692010).

Almost surely, 2^7975670643 is an apocalyptic number.

7975670643 is a deficient number, since it is larger than the sum of its proper divisors (3843401517).

7975670643 is a wasteful number, since it uses less digits than its factorization.

7975670643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81603 (or 81597 counting only the distinct ones).

The product of its (nonzero) digits is 6667920, while the sum is 54.

The square root of 7975670643 is about 89306.6102984544. The cubic root of 7975670643 is about 1997.9704948343.

The spelling of 7975670643 in words is "seven billion, nine hundred seventy-five million, six hundred seventy thousand, six hundred forty-three".