71558061 has 4 divisors (see below), whose sum is σ = 95410752. Its totient is φ = 47705372.

The previous prime is 71558033. The next prime is 71558087. The reversal of 71558061 is 16085517.

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 71558061 - 2⁵ = 71558029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71558021) 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, 11926341 + ... + 11926346.

It is an arithmetic number, because the mean of its divisors is an integer number (23852688).

Almost surely, 2^71558061 is an apocalyptic number.

It is an amenable number.

71558061 is a deficient number, since it is larger than the sum of its proper divisors (23852691).

71558061 is a wasteful number, since it uses less digits than its factorization.

71558061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23852690.

The product of its (nonzero) digits is 8400, while the sum is 33.

The square root of 71558061 is about 8459.1997848496. The cubic root of 71558061 is about 415.1638410509.

The spelling of 71558061 in words is "seventy-one million, five hundred fifty-eight thousand, sixty-one".