71651891137 has 16 divisors (see below), whose sum is σ = 75132997632. Its totient is φ = 68245713360.

The previous prime is 71651891123. The next prime is 71651891149. The reversal of 71651891137 is 73119815617.

It is a cyclic number.

It is not a de Polignac number, because 71651891137 - 2⁷ = 71651891009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71651891117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2450868 + ... + 2479930.

It is an arithmetic number, because the mean of its divisors is an integer number (4695812352).

Almost surely, 2^71651891137 is an apocalyptic number.

It is an amenable number.

71651891137 is a deficient number, since it is larger than the sum of its proper divisors (3481106495).

71651891137 is a wasteful number, since it uses less digits than its factorization.

71651891137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30348.

The product of its digits is 317520, while the sum is 49.

The spelling of 71651891137 in words is "seventy-one billion, six hundred fifty-one million, eight hundred ninety-one thousand, one hundred thirty-seven".