2657653907689 has 4 divisors (see below), whose sum is σ = 2899258808400. Its totient is φ = 2416049006980.

The previous prime is 2657653907687. The next prime is 2657653907737. The reversal of 2657653907689 is 9867093567562.

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 a cyclic number.

It is not a de Polignac number, because 2657653907689 - 2¹ = 2657653907687 is a prime.

It is a super-2 number, since 2×2657653907689² (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 (2657653907687) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 120802450339 + ... + 120802450360.

It is an arithmetic number, because the mean of its divisors is an integer number (724814702100).

Almost surely, 2^{2657653907689} is an apocalyptic number.

It is an amenable number.

2657653907689 is a deficient number, since it is larger than the sum of its proper divisors (241604900711).

2657653907689 is a wasteful number, since it uses less digits than its factorization.

2657653907689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241604900710.

The product of its (nonzero) digits is 1028764800, while the sum is 73.

The spelling of 2657653907689 in words is "two trillion, six hundred fifty-seven billion, six hundred fifty-three million, nine hundred seven thousand, six hundred eighty-nine".