2689293666465 has 96 divisors (see below), whose sum is σ = 5381280043776. Its totient is φ = 1216954252800.

The previous prime is 2689293666457. The next prime is 2689293666503. The reversal of 2689293666465 is 5646663929862.

It is a happy number.

It is not a de Polignac number, because 2689293666465 - 2³ = 2689293666457 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2689293666393 and 2689293666402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 282098839 + ... + 282108371.

It is an arithmetic number, because the mean of its divisors is an integer number (56055000456).

Almost surely, 2^{2689293666465} is an apocalyptic number.

It is an amenable number.

2689293666465 is an abundant number, since it is smaller than the sum of its proper divisors (2691986377311).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2689293666465 is a wasteful number, since it uses less digits than its factorization.

2689293666465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18519 (or 18516 counting only the distinct ones).

The product of its digits is 1209323520, while the sum is 72.

The spelling of 2689293666465 in words is "two trillion, six hundred eighty-nine billion, two hundred ninety-three million, six hundred sixty-six thousand, four hundred sixty-five".