7253645643 has 24 divisors (see below), whose sum is σ = 10611029520. Its totient is φ = 4774210560.

The previous prime is 7253645617. The next prime is 7253645699. The reversal of 7253645643 is 3465463527.

7253645643 is a `hidden beast` number, since 7 + 25 + 3 + 64 + 564 + 3 = 666.

It is not a de Polignac number, because 7253645643 - 2⁵ = 7253645611 is a prime.

It is a super-2 number, since 2×7253645643² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7253645543) 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 23 ways as a sum of consecutive naturals, for example, 1588083 + ... + 1592643.

It is an arithmetic number, because the mean of its divisors is an integer number (442126230).

Almost surely, 2^7253645643 is an apocalyptic number.

7253645643 is a deficient number, since it is larger than the sum of its proper divisors (3357383877).

7253645643 is a wasteful number, since it uses less digits than its factorization.

7253645643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6779 (or 6776 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 45.

The square root of 7253645643 is about 85168.3370919029. The cubic root of 7253645643 is about 1935.7626759374.

The spelling of 7253645643 in words is "seven billion, two hundred fifty-three million, six hundred forty-five thousand, six hundred forty-three".