27801053478 has 48 divisors (see below), whose sum is σ = 65948936976. Its totient is φ = 8394131520.

The previous prime is 27801053383. The next prime is 27801053521. The reversal of 27801053478 is 87435010872.

27801053478 is a `hidden beast` number, since 2 + 78 + 0 + 105 + 3 + 478 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 198601 + ... + 308292.

It is an arithmetic number, because the mean of its divisors is an integer number (1373936187).

Almost surely, 2^27801053478 is an apocalyptic number.

27801053478 is an abundant number, since it is smaller than the sum of its proper divisors (38147883498).

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

27801053478 is a wasteful number, since it uses less digits than its factorization.

27801053478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507189 (or 507186 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 27801053478 in words is "twenty-seven billion, eight hundred one million, fifty-three thousand, four hundred seventy-eight".