27770954478 has 16 divisors (see below), whose sum is σ = 55805143296. Its totient is φ = 9213112440.

The previous prime is 27770954447. The next prime is 27770954501. The reversal of 27770954478 is 87445907772.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10966726 + ... + 10969257.

It is an arithmetic number, because the mean of its divisors is an integer number (3487821456).

Almost surely, 2^27770954478 is an apocalyptic number.

27770954478 is an abundant number, since it is smaller than the sum of its proper divisors (28034188818).

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

27770954478 is a wasteful number, since it uses less digits than its factorization.

27770954478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21936199.

The product of its (nonzero) digits is 27659520, while the sum is 60.

The spelling of 27770954478 in words is "twenty-seven billion, seven hundred seventy million, nine hundred fifty-four thousand, four hundred seventy-eight".