71768561445 has 48 divisors (see below), whose sum is σ = 150533061120. Its totient is φ = 30878572032.

The previous prime is 71768561419. The next prime is 71768561477. The reversal of 71768561445 is 54416586717.

71768561445 is a `hidden beast` number, since 7 + 1 + 76 + 8 + 561 + 4 + 4 + 5 = 666.

It is not a de Polignac number, because 71768561445 - 2¹⁰ = 71768560421 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 71768561391 and 71768561400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6695725 + ... + 6706434.

It is an arithmetic number, because the mean of its divisors is an integer number (3136105440).

Almost surely, 2^71768561445 is an apocalyptic number.

It is an amenable number.

71768561445 is an abundant number, since it is smaller than the sum of its proper divisors (78764499675).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71768561445 is a wasteful number, since it uses less digits than its factorization.

71768561445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13402194 (or 13402191 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 71768561445 in words is "seventy-one billion, seven hundred sixty-eight million, five hundred sixty-one thousand, four hundred forty-five".