2049178478 has 4 divisors (see below), whose sum is σ = 3073767720. Its totient is φ = 1024589238.

The previous prime is 2049178463. The next prime is 2049178489. The reversal of 2049178478 is 8748719402.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512294618 + ... + 512294621.

It is an arithmetic number, because the mean of its divisors is an integer number (768441930).

Almost surely, 2^2049178478 is an apocalyptic number.

2049178478 is a deficient number, since it is larger than the sum of its proper divisors (1024589242).

2049178478 is a wasteful number, since it uses less digits than its factorization.

2049178478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024589241.

The product of its (nonzero) digits is 903168, while the sum is 50.

The square root of 2049178478 is about 45267.8525887853. The cubic root of 2049178478 is about 1270.1643778389.

The spelling of 2049178478 in words is "two billion, forty-nine million, one hundred seventy-eight thousand, four hundred seventy-eight".