2500479978 has 16 divisors (see below), whose sum is σ = 5030907840. Its totient is φ = 828502016.

The previous prime is 2500479967. The next prime is 2500479979. The reversal of 2500479978 is 8799740052.

It is a self number, because there is not a number n which added to its sum of digits gives 2500479978.

It is not an unprimeable number, because it can be changed into a prime (2500479979) 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, 1246743 + ... + 1248746.

It is an arithmetic number, because the mean of its divisors is an integer number (314431740).

Almost surely, 2^2500479978 is an apocalyptic number.

2500479978 is an abundant number, since it is smaller than the sum of its proper divisors (2530427862).

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

2500479978 is a wasteful number, since it uses less digits than its factorization.

2500479978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495661.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The square root of 2500479978 is about 50004.7995496432. The cubic root of 2500479978 is about 1357.2956601220.

The spelling of 2500479978 in words is "two billion, five hundred million, four hundred seventy-nine thousand, nine hundred seventy-eight".