71756494027 has 4 divisors (see below), whose sum is σ = 74230855920. Its totient is φ = 69282132136.

The previous prime is 71756493997. The next prime is 71756494093. The reversal of 71756494027 is 72049465717.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71756494027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71756494427) 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, 1237180903 + ... + 1237180960.

It is an arithmetic number, because the mean of its divisors is an integer number (18557713980).

Almost surely, 2^71756494027 is an apocalyptic number.

71756494027 is a deficient number, since it is larger than the sum of its proper divisors (2474361893).

71756494027 is a wasteful number, since it uses less digits than its factorization.

71756494027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474361892.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 71756494027 in words is "seventy-one billion, seven hundred fifty-six million, four hundred ninety-four thousand, twenty-seven".