2478135778 has 8 divisors (see below), whose sum is σ = 3718073772. Its totient is φ = 1238777856.

The previous prime is 2478135773. The next prime is 2478135799. The reversal of 2478135778 is 8775318742.

It can be written as a sum of positive squares in 2 ways, for example, as 1491736129 + 986399649 = 38623^2 + 31407^2 .

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

It is a super-2 number, since 2×2478135778² = 12282313868407330568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2478135773) by changing a digit.

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, 134175 + ... + 151522.

Almost surely, 2^2478135778 is an apocalyptic number.

2478135778 is a deficient number, since it is larger than the sum of its proper divisors (1239937994).

2478135778 is a wasteful number, since it uses less digits than its factorization.

2478135778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290036.

The product of its digits is 2634240, while the sum is 52.

The square root of 2478135778 is about 49780.8776338867. The cubic root of 2478135778 is about 1353.2406423098.

The spelling of 2478135778 in words is "two billion, four hundred seventy-eight million, one hundred thirty-five thousand, seven hundred seventy-eight".