6745448385 has 48 divisors (see below), whose sum is σ = 12721419984. Its totient is φ = 3286573056.

The previous prime is 6745448357. The next prime is 6745448393. The reversal of 6745448385 is 5838445476.

It is a happy number.

6745448385 is a `hidden beast` number, since 67 + 4 + 544 + 8 + 38 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 198049329 + 6547399056 = 14073^2 + 80916^2 .

It is not a de Polignac number, because 6745448385 - 2⁶ = 6745448321 is a prime.

It is an unprimeable number.

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, 2692 + ... + 116181.

It is an arithmetic number, because the mean of its divisors is an integer number (265029583).

Almost surely, 2^6745448385 is an apocalyptic number.

6745448385 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6745448385 is a deficient number, since it is larger than the sum of its proper divisors (5975971599).

6745448385 is a wasteful number, since it uses less digits than its factorization.

6745448385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118994 (or 118991 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 54.

The square root of 6745448385 is about 82130.6787077764. The cubic root of 6745448385 is about 1889.4566885444.

The spelling of 6745448385 in words is "six billion, seven hundred forty-five million, four hundred forty-eight thousand, three hundred eighty-five".