68540725 has 24 divisors (see below), whose sum is σ = 94993920. Its totient is φ = 48624000.

The previous prime is 68540723. The next prime is 68540729. The reversal of 68540725 is 52704586.

It is a happy number.

It is not a de Polignac number, because 68540725 - 2¹ = 68540723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68540723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8236 + ... + 14314.

It is an arithmetic number, because the mean of its divisors is an integer number (3958080).

Almost surely, 2^68540725 is an apocalyptic number.

It is an amenable number.

68540725 is a deficient number, since it is larger than the sum of its proper divisors (26453195).

68540725 is a wasteful number, since it uses less digits than its factorization.

68540725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6141 (or 6136 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 68540725 is about 8278.9326002813. The cubic root of 68540725 is about 409.2445438289.

The spelling of 68540725 in words is "sixty-eight million, five hundred forty thousand, seven hundred twenty-five".