72349125668 has 6 divisors (see below), whose sum is σ = 126610969926. Its totient is φ = 36174562832.

The previous prime is 72349125647. The next prime is 72349125683. The reversal of 72349125668 is 86652194327.

It can be written as a sum of positive squares in only one way, i.e., 58335774784 + 14013350884 = 241528^2 + 118378^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9043640705 + ... + 9043640712.

It is an arithmetic number, because the mean of its divisors is an integer number (21101828321).

Almost surely, 2^72349125668 is an apocalyptic number.

It is an amenable number.

72349125668 is a deficient number, since it is larger than the sum of its proper divisors (54261844258).

72349125668 is a wasteful number, since it uses less digits than its factorization.

72349125668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18087281421 (or 18087281419 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 53.

The spelling of 72349125668 in words is "seventy-two billion, three hundred forty-nine million, one hundred twenty-five thousand, six hundred sixty-eight".