68631485 has 16 divisors (see below), whose sum is σ = 91093296. Its totient is φ = 49310208.

The previous prime is 68631481. The next prime is 68631491. The reversal of 68631485 is 58413686.

It can be written as a sum of positive squares in 8 ways, for example, as 4214809 + 64416676 = 2053^2 + 8026^2 .

It is a cyclic number.

It is not a de Polignac number, because 68631485 - 2² = 68631481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68631481) 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, 11864 + ... + 16673.

It is an arithmetic number, because the mean of its divisors is an integer number (5693331).

Almost surely, 2^68631485 is an apocalyptic number.

68631485 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68631485 is a deficient number, since it is larger than the sum of its proper divisors (22461811).

68631485 is a wasteful number, since it uses less digits than its factorization.

68631485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28592.

The product of its digits is 138240, while the sum is 41.

The square root of 68631485 is about 8284.4121698525. The cubic root of 68631485 is about 409.4251014570.

The spelling of 68631485 in words is "sixty-eight million, six hundred thirty-one thousand, four hundred eighty-five".