72528921308 has 6 divisors (see below), whose sum is σ = 126925612296. Its totient is φ = 36264460652.

The previous prime is 72528921247. The next prime is 72528921317. The reversal of 72528921308 is 80312982527.

It is a super-3 number, since 3×72528921308³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9066115160 + ... + 9066115167.

It is an arithmetic number, because the mean of its divisors is an integer number (21154268716).

Almost surely, 2^72528921308 is an apocalyptic number.

It is an amenable number.

72528921308 is a deficient number, since it is larger than the sum of its proper divisors (54396690988).

72528921308 is a wasteful number, since it uses less digits than its factorization.

72528921308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18132230331 (or 18132230329 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 72528921308 in words is "seventy-two billion, five hundred twenty-eight million, nine hundred twenty-one thousand, three hundred eight".