2499165765625 has 21 divisors (see below), whose sum is σ = 3124164248467. Its totient is φ = 1999174525000.

The previous prime is 2499165765611. The next prime is 2499165765631. The reversal of 2499165765625 is 5265675619942.

The square root of 2499165765625 is 1580875.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 3 ways, for example, as 2189509130601 + 309656635024 = 1479699^2 + 556468^2 .

It is not a de Polignac number, because 2499165765625 - 2⁷ = 2499165765497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 197603052 + ... + 197615698.

Almost surely, 2^{2499165765625} is an apocalyptic number.

2499165765625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2499165765625 is the 1580875-th square number.

2499165765625 is the 790438-th centered octagonal number.

It is an amenable number.

2499165765625 is a deficient number, since it is larger than the sum of its proper divisors (624998482842).

2499165765625 is an frugal number, since it uses more digits than its factorization.

2499165765625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25324 (or 12652 counting only the distinct ones).

The product of its digits is 244944000, while the sum is 67.

The spelling of 2499165765625 in words is "two trillion, four hundred ninety-nine billion, one hundred sixty-five million, seven hundred sixty-five thousand, six hundred twenty-five".