68774609487 has 4 divisors (see below), whose sum is σ = 91699479320. Its totient is φ = 45849739656.

The previous prime is 68774609479. The next prime is 68774609507. The reversal of 68774609487 is 78490647786.

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

It is not a de Polignac number, because 68774609487 - 2³ = 68774609479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68774609447) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 11462434912 + ... + 11462434917.

It is an arithmetic number, because the mean of its divisors is an integer number (22924869830).

Almost surely, 2^68774609487 is an apocalyptic number.

68774609487 is a deficient number, since it is larger than the sum of its proper divisors (22924869833).

68774609487 is a wasteful number, since it uses less digits than its factorization.

68774609487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22924869832.

The product of its (nonzero) digits is 113799168, while the sum is 66.

The spelling of 68774609487 in words is "sixty-eight billion, seven hundred seventy-four million, six hundred nine thousand, four hundred eighty-seven".