72775723736 has 8 divisors (see below), whose sum is σ = 136454482020. Its totient is φ = 36387861864.

The previous prime is 72775723717. The next prime is 72775723771. The reversal of 72775723736 is 63732757727.

It is a tau number, because it is divible by the number of its divisors (8).

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, 4548482726 + ... + 4548482741.

Almost surely, 2^72775723736 is an apocalyptic number.

It is an amenable number.

72775723736 is a deficient number, since it is larger than the sum of its proper divisors (63678758284).

72775723736 is a wasteful number, since it uses less digits than its factorization.

72775723736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096965473 (or 9096965469 counting only the distinct ones).

The product of its digits is 18151560, while the sum is 56.

The spelling of 72775723736 in words is "seventy-two billion, seven hundred seventy-five million, seven hundred twenty-three thousand, seven hundred thirty-six".