75144643 has 8 divisors (see below), whose sum is σ = 85932288. Its totient is φ = 64370184.

The previous prime is 75144617. The next prime is 75144647. The reversal of 75144643 is 34644157.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75144643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75144599 and 75144608.

It is not an unprimeable number, because it can be changed into a prime (75144647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18930 + ... + 22552.

It is an arithmetic number, because the mean of its divisors is an integer number (10741536).

Almost surely, 2^75144643 is an apocalyptic number.

75144643 is a deficient number, since it is larger than the sum of its proper divisors (10787645).

75144643 is a wasteful number, since it uses less digits than its factorization.

75144643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6593.

The product of its digits is 40320, while the sum is 34.

The square root of 75144643 is about 8668.6009828576. The cubic root of 75144643 is about 421.9872621808.

The spelling of 75144643 in words is "seventy-five million, one hundred forty-four thousand, six hundred forty-three".