6413556421 has 4 divisors (see below), whose sum is σ = 6413821344. Its totient is φ = 6413291500.

The previous prime is 6413556407. The next prime is 6413556433. The reversal of 6413556421 is 1246553146.

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 6413556421 - 2⁵ = 6413556389 is a prime.

It is a super-2 number, since 2×6413556421² = 82267411930700658482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6413556491) 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, 92035 + ... + 145936.

It is an arithmetic number, because the mean of its divisors is an integer number (1603455336).

Almost surely, 2^6413556421 is an apocalyptic number.

It is an amenable number.

6413556421 is a deficient number, since it is larger than the sum of its proper divisors (264923).

6413556421 is a wasteful number, since it uses less digits than its factorization.

6413556421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264922.

The product of its digits is 86400, while the sum is 37.

The square root of 6413556421 is about 80084.6828113841. The cubic root of 6413556421 is about 1857.9455117091.

The spelling of 6413556421 in words is "six billion, four hundred thirteen million, five hundred fifty-six thousand, four hundred twenty-one".