68591745 has 16 divisors (see below), whose sum is σ = 121941120. Its totient is φ = 36582192.

The previous prime is 68591741. The next prime is 68591779. The reversal of 68591745 is 54719586.

It is not a de Polignac number, because 68591745 - 2² = 68591741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68591745.

It is not an unprimeable number, because it can be changed into a prime (68591741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253909 + ... + 254178.

It is an arithmetic number, because the mean of its divisors is an integer number (7621320).

Almost surely, 2^68591745 is an apocalyptic number.

It is an amenable number.

68591745 is a deficient number, since it is larger than the sum of its proper divisors (53349375).

68591745 is a wasteful number, since it uses less digits than its factorization.

68591745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508101 (or 508095 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 68591745 is about 8282.0133421771. The cubic root of 68591745 is about 409.3460624418.

The spelling of 68591745 in words is "sixty-eight million, five hundred ninety-one thousand, seven hundred forty-five".