71656051711 has 4 divisors (see below), whose sum is σ = 71663108400. Its totient is φ = 71648995024.

The previous prime is 71656051699. The next prime is 71656051723. The reversal of 71656051711 is 11715065617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11715065617 = 23 ⋅509350679.

It is an interprime number because it is at equal distance from previous prime (71656051699) and next prime (71656051723).

It is a cyclic number.

It is not a de Polignac number, because 71656051711 - 2⁷ = 71656051583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71656051741) 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, 3513091 + ... + 3533428.

It is an arithmetic number, because the mean of its divisors is an integer number (17915777100).

Almost surely, 2^71656051711 is an apocalyptic number.

71656051711 is a deficient number, since it is larger than the sum of its proper divisors (7056689).

71656051711 is a wasteful number, since it uses less digits than its factorization.

71656051711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7056688.

The product of its (nonzero) digits is 44100, while the sum is 40.

The spelling of 71656051711 in words is "seventy-one billion, six hundred fifty-six million, fifty-one thousand, seven hundred eleven".