2500005578 has 32 divisors (see below), whose sum is σ = 4444953600. Its totient is φ = 1053848880.

The previous prime is 2500005553. The next prime is 2500005583. The reversal of 2500005578 is 8755000052.

It is a happy number.

It is a super-2 number, since 2×2500005578² = 12500055780062228168, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11975 + ... + 71717.

It is an arithmetic number, because the mean of its divisors is an integer number (138904800).

Almost surely, 2^2500005578 is an apocalyptic number.

2500005578 is a deficient number, since it is larger than the sum of its proper divisors (1944948022).

2500005578 is an equidigital number, since it uses as much as digits as its factorization.

2500005578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59827 (or 59813 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 2500005578 is about 50000.0557799689. The cubic root of 2500005578 is about 1357.2098176981.

The spelling of 2500005578 in words is "two billion, five hundred million, five thousand, five hundred seventy-eight".