68787745 has 16 divisors (see below), whose sum is σ = 90965952. Its totient is φ = 49613760.

The previous prime is 68787727. The next prime is 68787751. The reversal of 68787745 is 54778786.

It is not a de Polignac number, because 68787745 - 2¹³ = 68779553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68787692 and 68787701.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9511 + ... + 15100.

It is an arithmetic number, because the mean of its divisors is an integer number (5685372).

Almost surely, 2^68787745 is an apocalyptic number.

68787745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68787745 is a deficient number, since it is larger than the sum of its proper divisors (22178207).

68787745 is a wasteful number, since it uses less digits than its factorization.

68787745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24672.

The product of its digits is 2634240, while the sum is 52.

The square root of 68787745 is about 8293.8377727081. The cubic root of 68787745 is about 409.7355919635.

The spelling of 68787745 in words is "sixty-eight million, seven hundred eighty-seven thousand, seven hundred forty-five".