2497789809 has 6 divisors (see below), whose sum is σ = 3607918626. Its totient is φ = 1665193200.

The previous prime is 2497789783. The next prime is 2497789813. The reversal of 2497789809 is 9089877942.

It can be written as a sum of positive squares in only one way, i.e., 1896167025 + 601622784 = 43545^2 + 24528^2 .

It is not a de Polignac number, because 2497789809 - 2⁹ = 2497789297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2497789109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138766092 + ... + 138766109.

It is an arithmetic number, because the mean of its divisors is an integer number (601319771).

Almost surely, 2^2497789809 is an apocalyptic number.

It is an amenable number.

2497789809 is a deficient number, since it is larger than the sum of its proper divisors (1110128817).

2497789809 is a wasteful number, since it uses less digits than its factorization.

2497789809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277532207 (or 277532204 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The square root of 2497789809 is about 49977.8932028952. The cubic root of 2497789809 is about 1356.8087316157.

The spelling of 2497789809 in words is "two billion, four hundred ninety-seven million, seven hundred eighty-nine thousand, eight hundred nine".