2689661523 has 4 divisors (see below), whose sum is σ = 3586215368. Its totient is φ = 1793107680.

The previous prime is 2689661519. The next prime is 2689661531. The reversal of 2689661523 is 3251669862.

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

It is not a de Polignac number, because 2689661523 - 2² = 2689661519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2689661503) 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, 448276918 + ... + 448276923.

It is an arithmetic number, because the mean of its divisors is an integer number (896553842).

Almost surely, 2^2689661523 is an apocalyptic number.

2689661523 is a deficient number, since it is larger than the sum of its proper divisors (896553845).

2689661523 is an equidigital number, since it uses as much as digits as its factorization.

2689661523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896553844.

The product of its digits is 933120, while the sum is 48.

The square root of 2689661523 is about 51861.9467721758. The cubic root of 2689661523 is about 1390.6970819939.

The spelling of 2689661523 in words is "two billion, six hundred eighty-nine million, six hundred sixty-one thousand, five hundred twenty-three".