6545237643 has 40 divisors (see below), whose sum is σ = 11831558112. Its totient is φ = 3520122624.

The previous prime is 6545237599. The next prime is 6545237653. The reversal of 6545237643 is 3467325456.

6545237643 is a `hidden beast` number, since 6 + 54 + 523 + 76 + 4 + 3 = 666.

It is not a de Polignac number, because 6545237643 - 2¹² = 6545233547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6545237653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 329880 + ... + 349157.

Almost surely, 2^6545237643 is an apocalyptic number.

6545237643 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6545237643 is a deficient number, since it is larger than the sum of its proper divisors (5286320469).

6545237643 is a wasteful number, since it uses less digits than its factorization.

6545237643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679073 (or 679064 counting only the distinct ones).

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

The square root of 6545237643 is about 80902.6429914376. The cubic root of 6545237643 is about 1870.5750605406.

The spelling of 6545237643 in words is "six billion, five hundred forty-five million, two hundred thirty-seven thousand, six hundred forty-three".