68185509272 has 8 divisors (see below), whose sum is σ = 127847829900. Its totient is φ = 34092754632.

The previous prime is 68185509251. The next prime is 68185509283. The reversal of 68185509272 is 27290558186.

It is a tau number, because it is divible by the number of its divisors (8).

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, 4261594322 + ... + 4261594337.

Almost surely, 2^68185509272 is an apocalyptic number.

It is an amenable number.

68185509272 is a deficient number, since it is larger than the sum of its proper divisors (59662320628).

68185509272 is a wasteful number, since it uses less digits than its factorization.

68185509272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8523188665 (or 8523188661 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 68185509272 in words is "sixty-eight billion, one hundred eighty-five million, five hundred nine thousand, two hundred seventy-two".