68669478615 has 64 divisors (see below), whose sum is σ = 127781452800. Its totient is φ = 31235364864.

The previous prime is 68669478557. The next prime is 68669478629. The reversal of 68669478615 is 51687496686.

It is not a de Polignac number, because 68669478615 - 2¹⁹ = 68668954327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 196680 + ... + 419549.

It is an arithmetic number, because the mean of its divisors is an integer number (1996585200).

Almost surely, 2^68669478615 is an apocalyptic number.

68669478615 is a deficient number, since it is larger than the sum of its proper divisors (59111974185).

68669478615 is a wasteful number, since it uses less digits than its factorization.

68669478615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616296.

The product of its digits is 104509440, while the sum is 66.

The spelling of 68669478615 in words is "sixty-eight billion, six hundred sixty-nine million, four hundred seventy-eight thousand, six hundred fifteen".