68777690438 has 4 divisors (see below), whose sum is σ = 103166535660. Its totient is φ = 34388845218.

The previous prime is 68777690419. The next prime is 68777690461. The reversal of 68777690438 is 83409677786.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17194422608 + ... + 17194422611.

It is an arithmetic number, because the mean of its divisors is an integer number (25791633915).

Almost surely, 2^68777690438 is an apocalyptic number.

68777690438 is a deficient number, since it is larger than the sum of its proper divisors (34388845222).

68777690438 is a wasteful number, since it uses less digits than its factorization.

68777690438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34388845221.

The product of its (nonzero) digits is 85349376, while the sum is 65.

The spelling of 68777690438 in words is "sixty-eight billion, seven hundred seventy-seven million, six hundred ninety thousand, four hundred thirty-eight".