6521850853 has 12 divisors (see below), whose sum is σ = 7771685292. Its totient is φ = 5453810880.

The previous prime is 6521850827. The next prime is 6521850857. The reversal of 6521850853 is 3580581256.

It can be written as a sum of positive squares in 2 ways, for example, as 3206164129 + 3315686724 = 56623^2 + 57582^2 .

It is not a de Polignac number, because 6521850853 - 2²¹ = 6519753701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6521850857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1621150 + ... + 1625167.

It is an arithmetic number, because the mean of its divisors is an integer number (647640441).

Almost surely, 2^6521850853 is an apocalyptic number.

It is an amenable number.

6521850853 is a deficient number, since it is larger than the sum of its proper divisors (1249834439).

6521850853 is a wasteful number, since it uses less digits than its factorization.

6521850853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3246372 (or 3246365 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The square root of 6521850853 is about 80757.9770239448. The cubic root of 6521850853 is about 1868.3444843557.

The spelling of 6521850853 in words is "six billion, five hundred twenty-one million, eight hundred fifty thousand, eight hundred fifty-three".