68642613 has 32 divisors (see below), whose sum is σ = 110073600. Its totient is φ = 42026688.

The previous prime is 68642591. The next prime is 68642647. The reversal of 68642613 is 31624686.

68642613 is a `hidden beast` number, since 6 + 8 + 642 + 6 + 1 + 3 = 666.

It is not a de Polignac number, because 68642613 - 2¹⁰ = 68641589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68642653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94056 + ... + 94782.

It is an arithmetic number, because the mean of its divisors is an integer number (3439800).

Almost surely, 2^68642613 is an apocalyptic number.

It is an amenable number.

68642613 is a deficient number, since it is larger than the sum of its proper divisors (41430987).

68642613 is a wasteful number, since it uses less digits than its factorization.

68642613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 1012 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 68642613 is about 8285.0837654184. The cubic root of 68642613 is about 409.4472285041.

The spelling of 68642613 in words is "sixty-eight million, six hundred forty-two thousand, six hundred thirteen".