6511697653 has 4 divisors (see below), whose sum is σ = 6721752448. Its totient is φ = 6301642860.

The previous prime is 6511697641. The next prime is 6511697657. The reversal of 6511697653 is 3567961156.

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 6511697653 - 2¹³ = 6511689461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6511697597 and 6511697606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6511697657) 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, 105027351 + ... + 105027412.

It is an arithmetic number, because the mean of its divisors is an integer number (1680438112).

Almost surely, 2^6511697653 is an apocalyptic number.

It is an amenable number.

6511697653 is a deficient number, since it is larger than the sum of its proper divisors (210054795).

6511697653 is a wasteful number, since it uses less digits than its factorization.

6511697653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210054794.

The product of its digits is 1020600, while the sum is 49.

The square root of 6511697653 is about 80695.0906375351. The cubic root of 6511697653 is about 1867.3744362232.

The spelling of 6511697653 in words is "six billion, five hundred eleven million, six hundred ninety-seven thousand, six hundred fifty-three".