30768978854 has 4 divisors (see below), whose sum is σ = 46153468284. Its totient is φ = 15384489426.

The previous prime is 30768978839. The next prime is 30768978857. The reversal of 30768978854 is 45887986703.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30768978857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7692244712 + ... + 7692244715.

It is an arithmetic number, because the mean of its divisors is an integer number (11538367071).

Almost surely, 2^30768978854 is an apocalyptic number.

30768978854 is a deficient number, since it is larger than the sum of its proper divisors (15384489430).

30768978854 is a wasteful number, since it uses less digits than its factorization.

30768978854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15384489429.

The product of its (nonzero) digits is 81285120, while the sum is 65.

The spelling of 30768978854 in words is "thirty billion, seven hundred sixty-eight million, nine hundred seventy-eight thousand, eight hundred fifty-four".