75193438321 has 4 divisors (see below), whose sum is σ = 78462718272. Its totient is φ = 71924158372.

The previous prime is 75193438303. The next prime is 75193438349. The reversal of 75193438321 is 12383439157.

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 75193438321 - 2²³ = 75185049713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75193438301) 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, 1634639941 + ... + 1634639986.

It is an arithmetic number, because the mean of its divisors is an integer number (19615679568).

Almost surely, 2^75193438321 is an apocalyptic number.

It is an amenable number.

75193438321 is a deficient number, since it is larger than the sum of its proper divisors (3269279951).

75193438321 is a wasteful number, since it uses less digits than its factorization.

75193438321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3269279950.

The product of its digits is 544320, while the sum is 46.

The spelling of 75193438321 in words is "seventy-five billion, one hundred ninety-three million, four hundred thirty-eight thousand, three hundred twenty-one".