2578404816 has 60 divisors (see below), whose sum is σ = 7771031268. Its totient is φ = 793354752.

The previous prime is 2578404797. The next prime is 2578404827. The reversal of 2578404816 is 6184048752.

It can be written as a sum of positive squares in 2 ways, for example, as 544755600 + 2033649216 = 23340^2 + 45096^2 .

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 686805 + ... + 690548.

Almost surely, 2^2578404816 is an apocalyptic number.

2578404816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2578404816 is an abundant number, since it is smaller than the sum of its proper divisors (5192626452).

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

2578404816 is a wasteful number, since it uses less digits than its factorization.

2578404816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377380 (or 1377371 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 2578404816 is about 50777.9953917049. The cubic root of 2578404816 is about 1371.2512439622.

The spelling of 2578404816 in words is "two billion, five hundred seventy-eight million, four hundred four thousand, eight hundred sixteen".