2649728725 has 24 divisors (see below), whose sum is σ = 3770685248. Its totient is φ = 1809388800.

The previous prime is 2649728707. The next prime is 2649728743. The reversal of 2649728725 is 5278279462.

It is an interprime number because it is at equal distance from previous prime (2649728707) and next prime (2649728743).

It is not a de Polignac number, because 2649728725 - 2²⁷ = 2515510997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10762 + ... + 73588.

Almost surely, 2^2649728725 is an apocalyptic number.

2649728725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2649728725 is a deficient number, since it is larger than the sum of its proper divisors (1120956523).

2649728725 is a wasteful number, since it uses less digits than its factorization.

2649728725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63085 (or 63080 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 52.

The square root of 2649728725 is about 51475.5157817773. The cubic root of 2649728725 is about 1383.7802821833.

The spelling of 2649728725 in words is "two billion, six hundred forty-nine million, seven hundred twenty-eight thousand, seven hundred twenty-five".