2497904645 has 4 divisors (see below), whose sum is σ = 2997485580. Its totient is φ = 1998323712.

The previous prime is 2497904641. The next prime is 2497904699. The reversal of 2497904645 is 5464097942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1058005729 + 1439898916 = 32527^2 + 37946^2 .

It is a cyclic number.

It is not a de Polignac number, because 2497904645 - 2² = 2497904641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2497904593 and 2497904602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2497904641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249790460 + ... + 249790469.

It is an arithmetic number, because the mean of its divisors is an integer number (749371395).

Almost surely, 2^2497904645 is an apocalyptic number.

It is an amenable number.

2497904645 is a deficient number, since it is larger than the sum of its proper divisors (499580935).

2497904645 is an equidigital number, since it uses as much as digits as its factorization.

2497904645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499580934.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The square root of 2497904645 is about 49979.0420576465. The cubic root of 2497904645 is about 1356.8295244115.

The spelling of 2497904645 in words is "two billion, four hundred ninety-seven million, nine hundred four thousand, six hundred forty-five".