75443644457 has 4 divisors (see below), whose sum is σ = 75449577600. Its totient is φ = 75437711316.

The previous prime is 75443644453. The next prime is 75443644483. The reversal of 75443644457 is 75444634457.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75443644457 - 2² = 75443644453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75443644399 and 75443644408.

It is not an unprimeable number, because it can be changed into a prime (75443644453) 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, 2947457 + ... + 2972942.

It is an arithmetic number, because the mean of its divisors is an integer number (18862394400).

Almost surely, 2^75443644457 is an apocalyptic number.

It is an amenable number.

75443644457 is a deficient number, since it is larger than the sum of its proper divisors (5933143).

75443644457 is a wasteful number, since it uses less digits than its factorization.

75443644457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5933142.

The product of its digits is 22579200, while the sum is 53.

The spelling of 75443644457 in words is "seventy-five billion, four hundred forty-three million, six hundred forty-four thousand, four hundred fifty-seven".