68778734050 has 24 divisors (see below), whose sum is σ = 137769096276. Its totient is φ = 25395224640.

The previous prime is 68778733999. The next prime is 68778734051. The reversal of 68778734050 is 5043787786.

It is a Cunningham number, because it is equal to 262257²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 843960601 + 67934773449 = 29051^2 + 260643^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68778733982 and 68778734000.

It is not an unprimeable number, because it can be changed into a prime (68778734051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52906069 + ... + 52907368.

Almost surely, 2^68778734050 is an apocalyptic number.

68778734050 is an abundant number, since it is smaller than the sum of its proper divisors (68990362226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68778734050 is a wasteful number, since it uses less digits than its factorization.

68778734050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105813462 (or 105813457 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 68778734050 in words is "sixty-eight billion, seven hundred seventy-eight million, seven hundred thirty-four thousand, fifty".