23178946778 has 8 divisors (see below), whose sum is σ = 37442914068. Its totient is φ = 10697975424.

The previous prime is 23178946753. The next prime is 23178946793. The reversal of 23178946778 is 87764987132.

It can be written as a sum of positive squares in 2 ways, for example, as 20062739449 + 3116207329 = 141643^2 + 55823^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 23178946778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445748951 + ... + 445749002.

Almost surely, 2^23178946778 is an apocalyptic number.

23178946778 is a deficient number, since it is larger than the sum of its proper divisors (14263967290).

23178946778 is a wasteful number, since it uses less digits than its factorization.

23178946778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891497968.

The product of its digits is 28449792, while the sum is 62.

The spelling of 23178946778 in words is "twenty-three billion, one hundred seventy-eight million, nine hundred forty-six thousand, seven hundred seventy-eight".