2523597978 has 64 divisors (see below), whose sum is σ = 5681829888. Its totient is φ = 740651520.

The previous prime is 2523597971. The next prime is 2523597983. The reversal of 2523597978 is 8797953252.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2523597971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296701 + ... + 305087.

It is an arithmetic number, because the mean of its divisors is an integer number (88778592).

Almost surely, 2^2523597978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2523597978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2840914944).

2523597978 is an abundant number, since it is smaller than the sum of its proper divisors (3158231910).

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

2523597978 is a wasteful number, since it uses less digits than its factorization.

2523597978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8547.

The product of its digits is 9525600, while the sum is 57.

The square root of 2523597978 is about 50235.4255282067. The cubic root of 2523597978 is about 1361.4657600139.

The spelling of 2523597978 in words is "two billion, five hundred twenty-three million, five hundred ninety-seven thousand, nine hundred seventy-eight".