71121922345 has 4 divisors (see below), whose sum is σ = 85346306820. Its totient is φ = 56897537872.

The previous prime is 71121922337. The next prime is 71121922397. The reversal of 71121922345 is 54322912117.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13947373801 + 57174548544 = 118099^2 + 239112^2 .

It is a cyclic number.

It is not a de Polignac number, because 71121922345 - 2³ = 71121922337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7112192230 + ... + 7112192239.

It is an arithmetic number, because the mean of its divisors is an integer number (21336576705).

Almost surely, 2^71121922345 is an apocalyptic number.

It is an amenable number.

71121922345 is a deficient number, since it is larger than the sum of its proper divisors (14224384475).

71121922345 is a wasteful number, since it uses less digits than its factorization.

71121922345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14224384474.

The product of its digits is 30240, while the sum is 37.

The spelling of 71121922345 in words is "seventy-one billion, one hundred twenty-one million, nine hundred twenty-two thousand, three hundred forty-five".