2649728451 has 4 divisors (see below), whose sum is σ = 3532971272. Its totient is φ = 1766485632.

The previous prime is 2649728401. The next prime is 2649728453. The reversal of 2649728451 is 1548279462.

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

It is not a de Polignac number, because 2649728451 - 2¹⁴ = 2649712067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2649728451.

It is not an unprimeable number, because it can be changed into a prime (2649728453) 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, 441621406 + ... + 441621411.

It is an arithmetic number, because the mean of its divisors is an integer number (883242818).

Almost surely, 2^2649728451 is an apocalyptic number.

2649728451 is a deficient number, since it is larger than the sum of its proper divisors (883242821).

2649728451 is an equidigital number, since it uses as much as digits as its factorization.

2649728451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883242820.

The product of its digits is 967680, while the sum is 48.

The square root of 2649728451 is about 51475.5131203177. The cubic root of 2649728451 is about 1383.7802344858.

The spelling of 2649728451 in words is "two billion, six hundred forty-nine million, seven hundred twenty-eight thousand, four hundred fifty-one".