68340617390 has 32 divisors (see below), whose sum is σ = 125094377376. Its totient is φ = 26874207360.

The previous prime is 68340617363. The next prime is 68340617399. The reversal of 68340617390 is 9371604386.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68340617399) 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, 1193864 + ... + 1249796.

It is an arithmetic number, because the mean of its divisors is an integer number (3909199293).

Almost surely, 2^68340617390 is an apocalyptic number.

68340617390 is a deficient number, since it is larger than the sum of its proper divisors (56753759986).

68340617390 is a wasteful number, since it uses less digits than its factorization.

68340617390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58004.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 68340617390 in words is "sixty-eight billion, three hundred forty million, six hundred seventeen thousand, three hundred ninety".