2649670689 has 4 divisors (see below), whose sum is σ = 3532894256. Its totient is φ = 1766447124.

The previous prime is 2649670687. The next prime is 2649670703. The reversal of 2649670689 is 9860769462.

2649670689 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2649670689 - 2¹ = 2649670687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2649670687) 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, 441611779 + ... + 441611784.

It is an arithmetic number, because the mean of its divisors is an integer number (883223564).

Almost surely, 2^2649670689 is an apocalyptic number.

It is an amenable number.

2649670689 is a deficient number, since it is larger than the sum of its proper divisors (883223567).

2649670689 is an equidigital number, since it uses as much as digits as its factorization.

2649670689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883223566.

The product of its (nonzero) digits is 7838208, while the sum is 57.

The square root of 2649670689 is about 51474.9520543730. The cubic root of 2649670689 is about 1383.7701793052.

The spelling of 2649670689 in words is "two billion, six hundred forty-nine million, six hundred seventy thousand, six hundred eighty-nine".