68648642 has 8 divisors (see below), whose sum is σ = 103042236. Its totient is φ = 34301232.

The previous prime is 68648617. The next prime is 68648651. The reversal of 68648642 is 24684686.

It can be written as a sum of positive squares in 2 ways, for example, as 58079641 + 10569001 = 7621^2 + 3251^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 68648593 and 68648602.

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, 7553 + ... + 13940.

Almost surely, 2^68648642 is an apocalyptic number.

68648642 is a deficient number, since it is larger than the sum of its proper divisors (34393594).

68648642 is a wasteful number, since it uses less digits than its factorization.

68648642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23092.

The product of its digits is 442368, while the sum is 44.

The square root of 68648642 is about 8285.4476040827. The cubic root of 68648642 is about 409.4592156404.

The spelling of 68648642 in words is "sixty-eight million, six hundred forty-eight thousand, six hundred forty-two".