6551856413 has 4 divisors (see below), whose sum is σ = 6567058368. Its totient is φ = 6536654460.

The previous prime is 6551856403. The next prime is 6551856461. The reversal of 6551856413 is 3146581556.

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 6551856413 - 2¹² = 6551852317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6551856403) 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, 7600331 + ... + 7601192.

It is an arithmetic number, because the mean of its divisors is an integer number (1641764592).

Almost surely, 2^6551856413 is an apocalyptic number.

It is an amenable number.

6551856413 is a deficient number, since it is larger than the sum of its proper divisors (15201955).

6551856413 is a wasteful number, since it uses less digits than its factorization.

6551856413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15201954.

The product of its digits is 432000, while the sum is 44.

The square root of 6551856413 is about 80943.5384264859. The cubic root of 6551856413 is about 1871.2053781230.

The spelling of 6551856413 in words is "six billion, five hundred fifty-one million, eight hundred fifty-six thousand, four hundred thirteen".