72081917372 has 12 divisors (see below), whose sum is σ = 126147837816. Its totient is φ = 36039678000.

The previous prime is 72081917339. The next prime is 72081917377. The reversal of 72081917372 is 27371918027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72081917377) 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 3 ways as a sum of consecutive naturals, for example, 187418 + ... + 423425.

It is an arithmetic number, because the mean of its divisors is an integer number (10512319818).

Almost surely, 2^72081917372 is an apocalyptic number.

It is an amenable number.

72081917372 is a deficient number, since it is larger than the sum of its proper divisors (54065920444).

72081917372 is a wasteful number, since it uses less digits than its factorization.

72081917372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 640348 (or 640346 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 47.

The spelling of 72081917372 in words is "seventy-two billion, eighty-one million, nine hundred seventeen thousand, three hundred seventy-two".