68581653 has 16 divisors (see below), whose sum is σ = 109049856. Its totient is φ = 37485360.

The previous prime is 68581649. The next prime is 68581663. The reversal of 68581653 is 35618586.

It is not a de Polignac number, because 68581653 - 2² = 68581649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68581613) 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, 70513 + ... + 71478.

It is an arithmetic number, because the mean of its divisors is an integer number (6815616).

Almost surely, 2^68581653 is an apocalyptic number.

It is an amenable number.

68581653 is a deficient number, since it is larger than the sum of its proper divisors (40468203).

68581653 is a wasteful number, since it uses less digits than its factorization.

68581653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142024.

The product of its digits is 172800, while the sum is 42.

The square root of 68581653 is about 8281.4040476238. The cubic root of 68581653 is about 409.3259855697.

The spelling of 68581653 in words is "sixty-eight million, five hundred eighty-one thousand, six hundred fifty-three".