75507505409 has 4 divisors (see below), whose sum is σ = 86294291904. Its totient is φ = 64720718916.

The previous prime is 75507505399. The next prime is 75507505421. The reversal of 75507505409 is 90450570557.

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 not a de Polignac number, because 75507505409 - 2¹² = 75507501313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75507505709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5393393237 + ... + 5393393250.

It is an arithmetic number, because the mean of its divisors is an integer number (21573572976).

Almost surely, 2^75507505409 is an apocalyptic number.

It is an amenable number.

75507505409 is a deficient number, since it is larger than the sum of its proper divisors (10786786495).

75507505409 is a wasteful number, since it uses less digits than its factorization.

75507505409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10786786494.

The product of its (nonzero) digits is 1102500, while the sum is 47.

The spelling of 75507505409 in words is "seventy-five billion, five hundred seven million, five hundred five thousand, four hundred nine".