72388087652 has 6 divisors (see below), whose sum is σ = 126679153398. Its totient is φ = 36194043824.

The previous prime is 72388087649. The next prime is 72388087661. The reversal of 72388087652 is 25678088327.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 68175298816 + 4212788836 = 261104^2 + 64906^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9048510953 + ... + 9048510960.

It is an arithmetic number, because the mean of its divisors is an integer number (21113192233).

Almost surely, 2^72388087652 is an apocalyptic number.

It is an amenable number.

72388087652 is a deficient number, since it is larger than the sum of its proper divisors (54291065746).

72388087652 is a wasteful number, since it uses less digits than its factorization.

72388087652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18097021917 (or 18097021915 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 72388087652 in words is "seventy-two billion, three hundred eighty-eight million, eighty-seven thousand, six hundred fifty-two".