68779587478 has 16 divisors (see below), whose sum is σ = 118366655904. Its totient is φ = 29362268160.

The previous prime is 68779587473. The next prime is 68779587493. The reversal of 68779587478 is 87478597786.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68779587473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9554433 + ... + 9561628.

It is an arithmetic number, because the mean of its divisors is an integer number (7397915994).

Almost surely, 2^68779587478 is an apocalyptic number.

68779587478 is a deficient number, since it is larger than the sum of its proper divisors (49587068426).

68779587478 is a wasteful number, since it uses less digits than its factorization.

68779587478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19116327.

The product of its digits is 1327656960, while the sum is 76.

The spelling of 68779587478 in words is "sixty-eight billion, seven hundred seventy-nine million, five hundred eighty-seven thousand, four hundred seventy-eight".