68515137 has 24 divisors (see below), whose sum is σ = 104457600. Its totient is φ = 43188288.

The previous prime is 68515127. The next prime is 68515163. The reversal of 68515137 is 73151586.

68515137 is a `hidden beast` number, since 6 + 8 + 515 + 137 = 666.

68515137 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 68515137 - 2¹⁰ = 68514113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68515127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16564 + ... + 20282.

It is an arithmetic number, because the mean of its divisors is an integer number (4352400).

Almost surely, 2^68515137 is an apocalyptic number.

It is an amenable number.

68515137 is a deficient number, since it is larger than the sum of its proper divisors (35942463).

68515137 is a wasteful number, since it uses less digits than its factorization.

68515137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837 (or 3834 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 68515137 is about 8277.3870877228. The cubic root of 68515137 is about 409.1936103496.

The spelling of 68515137 in words is "sixty-eight million, five hundred fifteen thousand, one hundred thirty-seven".