6398551149 has 4 divisors (see below), whose sum is σ = 8531401536. Its totient is φ = 4265700764.

The previous prime is 6398551129. The next prime is 6398551177. The reversal of 6398551149 is 9411558936.

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 6398551149 - 2⁷ = 6398551021 is a prime.

It is a super-3 number, since 3×6398551149³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6398551109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1066425189 + ... + 1066425194.

It is an arithmetic number, because the mean of its divisors is an integer number (2132850384).

Almost surely, 2^6398551149 is an apocalyptic number.

It is an amenable number.

6398551149 is a deficient number, since it is larger than the sum of its proper divisors (2132850387).

6398551149 is a wasteful number, since it uses less digits than its factorization.

6398551149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132850386.

The product of its digits is 1166400, while the sum is 51.

The square root of 6398551149 is about 79990.9441686995. The cubic root of 6398551149 is about 1856.4954193168.

The spelling of 6398551149 in words is "six billion, three hundred ninety-eight million, five hundred fifty-one thousand, one hundred forty-nine".