68615642 has 8 divisors (see below), whose sum is σ = 102962676. Its totient is φ = 34294752.

The previous prime is 68615641. The next prime is 68615671. The reversal of 68615642 is 24651686.

It can be written as a sum of positive squares in 2 ways, for example, as 65626201 + 2989441 = 8101^2 + 1729^2 .

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 = 68615596 and 68615605.

It is not an unprimeable number, because it can be changed into a prime (68615641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2558 + ... + 11990.

Almost surely, 2^68615642 is an apocalyptic number.

68615642 is a deficient number, since it is larger than the sum of its proper divisors (34347034).

68615642 is a wasteful number, since it uses less digits than its factorization.

68615642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13072.

The product of its digits is 69120, while the sum is 38.

The square root of 68615642 is about 8283.4559212928. The cubic root of 68615642 is about 409.3935949209.

The spelling of 68615642 in words is "sixty-eight million, six hundred fifteen thousand, six hundred forty-two".