75505161 has 4 divisors (see below), whose sum is σ = 100673552. Its totient is φ = 50336772.

The previous prime is 75505153. The next prime is 75505201. The reversal of 75505161 is 16150557.

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 75505161 - 2³ = 75505153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75505121) 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, 12584191 + ... + 12584196.

It is an arithmetic number, because the mean of its divisors is an integer number (25168388).

Almost surely, 2^75505161 is an apocalyptic number.

It is an amenable number.

75505161 is a deficient number, since it is larger than the sum of its proper divisors (25168391).

75505161 is a wasteful number, since it uses less digits than its factorization.

75505161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25168390.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 75505161 is about 8689.3705755941. The cubic root of 75505161 is about 422.6610354474.

The spelling of 75505161 in words is "seventy-five million, five hundred five thousand, one hundred sixty-one".