75272031643 has 4 divisors (see below), whose sum is σ = 77700161728. Its totient is φ = 72843901560.

The previous prime is 75272031641. The next prime is 75272031647. The reversal of 75272031643 is 34613027257.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75272031643 - 2¹ = 75272031641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75272031596 and 75272031605.

It is not an unprimeable number, because it can be changed into a prime (75272031641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214064996 + ... + 1214065057.

It is an arithmetic number, because the mean of its divisors is an integer number (19425040432).

Almost surely, 2^75272031643 is an apocalyptic number.

75272031643 is a deficient number, since it is larger than the sum of its proper divisors (2428130085).

75272031643 is a wasteful number, since it uses less digits than its factorization.

75272031643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428130084.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 75272031643 in words is "seventy-five billion, two hundred seventy-two million, thirty-one thousand, six hundred forty-three".