6405147853 has 4 divisors (see below), whose sum is σ = 6897851548. Its totient is φ = 5912444160.

The previous prime is 6405147841. The next prime is 6405147869. The reversal of 6405147853 is 3587415046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1333856484 + 5071291369 = 36522^2 + 71213^2 .

It is a cyclic number.

It is not a de Polignac number, because 6405147853 - 2¹³ = 6405139661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6405147883) 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, 246351828 + ... + 246351853.

It is an arithmetic number, because the mean of its divisors is an integer number (1724462887).

Almost surely, 2^6405147853 is an apocalyptic number.

It is an amenable number.

6405147853 is a deficient number, since it is larger than the sum of its proper divisors (492703695).

6405147853 is a wasteful number, since it uses less digits than its factorization.

6405147853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492703694.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 6405147853 is about 80032.1676140288. The cubic root of 6405147853 is about 1857.1331962245.

The spelling of 6405147853 in words is "six billion, four hundred five million, one hundred forty-seven thousand, eight hundred fifty-three".