68645642 has 8 divisors (see below), whose sum is σ = 110889156. Its totient is φ = 31682592.

The previous prime is 68645627. The next prime is 68645671. The reversal of 68645642 is 24654686.

It can be written as a sum of positive squares in 2 ways, for example, as 49294441 + 19351201 = 7021^2 + 4399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 68645642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1320083 + ... + 1320134.

Almost surely, 2^68645642 is an apocalyptic number.

68645642 is a deficient number, since it is larger than the sum of its proper divisors (42243514).

68645642 is a wasteful number, since it uses less digits than its factorization.

68645642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640232.

The product of its digits is 276480, while the sum is 41.

The square root of 68645642 is about 8285.2665617951. The cubic root of 68645642 is about 409.4532509896.

The spelling of 68645642 in words is "sixty-eight million, six hundred forty-five thousand, six hundred forty-two".