6478216149 has 4 divisors (see below), whose sum is σ = 8637621536. Its totient is φ = 4318810764.

The previous prime is 6478216139. The next prime is 6478216153. The reversal of 6478216149 is 9416128746.

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 not a de Polignac number, because 6478216149 - 2⁷ = 6478216021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6478216098 and 6478216107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478216139) 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, 1079702689 + ... + 1079702694.

It is an arithmetic number, because the mean of its divisors is an integer number (2159405384).

Almost surely, 2^6478216149 is an apocalyptic number.

It is an amenable number.

6478216149 is a deficient number, since it is larger than the sum of its proper divisors (2159405387).

6478216149 is a wasteful number, since it uses less digits than its factorization.

6478216149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159405386.

The product of its digits is 580608, while the sum is 48.

The square root of 6478216149 is about 80487.3663937391. The cubic root of 6478216149 is about 1864.1684125689.

The spelling of 6478216149 in words is "six billion, four hundred seventy-eight million, two hundred sixteen thousand, one hundred forty-nine".