75640571 has 4 divisors (see below), whose sum is σ = 75679200. Its totient is φ = 75601944.

The previous prime is 75640561. The next prime is 75640627. The reversal of 75640571 is 17504657.

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 75640571 - 2¹⁴ = 75624187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75640561) 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, 16211 + ... + 20348.

It is an arithmetic number, because the mean of its divisors is an integer number (18919800).

Almost surely, 2^75640571 is an apocalyptic number.

75640571 is a deficient number, since it is larger than the sum of its proper divisors (38629).

75640571 is a wasteful number, since it uses less digits than its factorization.

75640571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38628.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 75640571 is about 8697.1587889379. The cubic root of 75640571 is about 422.9135495393.

The spelling of 75640571 in words is "seventy-five million, six hundred forty thousand, five hundred seventy-one".