72767643520 has 128 divisors (see below), whose sum is σ = 204373018080. Its totient is φ = 24425472000.

The previous prime is 72767643499. The next prime is 72767643527. The reversal of 72767643520 is 2534676727.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72767643527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306031 + ... + 489070.

Almost surely, 2^72767643520 is an apocalyptic number.

It is an amenable number.

72767643520 is an abundant number, since it is smaller than the sum of its proper divisors (131605374560).

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

72767643520 is a wasteful number, since it uses less digits than its factorization.

72767643520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795144 (or 795132 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 49.

The spelling of 72767643520 in words is "seventy-two billion, seven hundred sixty-seven million, six hundred forty-three thousand, five hundred twenty".