71811507934 has 4 divisors (see below), whose sum is σ = 107717261904. Its totient is φ = 35905753966.

The previous prime is 71811507923. The next prime is 71811507983. The reversal of 71811507934 is 43970511817.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17952876982 + ... + 17952876985.

It is an arithmetic number, because the mean of its divisors is an integer number (26929315476).

Almost surely, 2^71811507934 is an apocalyptic number.

71811507934 is a deficient number, since it is larger than the sum of its proper divisors (35905753970).

71811507934 is a wasteful number, since it uses less digits than its factorization.

71811507934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35905753969.

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 71811507934 in words is "seventy-one billion, eight hundred eleven million, five hundred seven thousand, nine hundred thirty-four".