6427216532 has 18 divisors (see below), whose sum is σ = 12363097194. Its totient is φ = 2921461840.

The previous prime is 6427216529. The next prime is 6427216547. The reversal of 6427216532 is 2356127246.

It can be written as a sum of positive squares in only one way, i.e., 5535955216 + 891261316 = 74404^2 + 29854^2 .

It is a super-2 number, since 2×6427216532² = 82618224698428214048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6639203 + ... + 6640170.

It is an arithmetic number, because the mean of its divisors is an integer number (686838733).

Almost surely, 2^6427216532 is an apocalyptic number.

It is an amenable number.

6427216532 is a deficient number, since it is larger than the sum of its proper divisors (5935880662).

6427216532 is a wasteful number, since it uses less digits than its factorization.

6427216532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13279399 (or 13279386 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 6427216532 is about 80169.9228638771. The cubic root of 6427216532 is about 1859.2636438518.

The spelling of 6427216532 in words is "six billion, four hundred twenty-seven million, two hundred sixteen thousand, five hundred thirty-two".