2656289784819 has 48 divisors (see below), whose sum is σ = 3940767272960. Its totient is φ = 1590215457600.

The previous prime is 2656289784779. The next prime is 2656289784821. The reversal of 2656289784819 is 9184879826562.

It is not a de Polignac number, because 2656289784819 - 2⁹ = 2656289784307 is a prime.

It is a super-2 number, since 2×2656289784819² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2656289784829) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10431324 + ... + 10682934.

Almost surely, 2^{2656289784819} is an apocalyptic number.

2656289784819 is a deficient number, since it is larger than the sum of its proper divisors (1284477488141).

2656289784819 is a wasteful number, since it uses less digits than its factorization.

2656289784819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251992 (or 251981 counting only the distinct ones).

The product of its digits is 836075520, while the sum is 75.

The spelling of 2656289784819 in words is "two trillion, six hundred fifty-six billion, two hundred eighty-nine million, seven hundred eighty-four thousand, eight hundred nineteen".