2478505578 has 16 divisors (see below), whose sum is σ = 5217906720. Its totient is φ = 782685936.

The previous prime is 2478505573. The next prime is 2478505613. The reversal of 2478505578 is 8755058742.

It is a super-2 number, since 2×2478505578² = 12285979800354228168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2478505578.

It is not an unprimeable number, because it can be changed into a prime (2478505573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10870525 + ... + 10870752.

It is an arithmetic number, because the mean of its divisors is an integer number (326119170).

Almost surely, 2^2478505578 is an apocalyptic number.

2478505578 is an abundant number, since it is smaller than the sum of its proper divisors (2739401142).

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

2478505578 is a wasteful number, since it uses less digits than its factorization.

2478505578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21741301.

The product of its (nonzero) digits is 3136000, while the sum is 51.

The square root of 2478505578 is about 49784.5917729572. The cubic root of 2478505578 is about 1353.3079514412.

The spelling of 2478505578 in words is "two billion, four hundred seventy-eight million, five hundred five thousand, five hundred seventy-eight".