6546421544 has 64 divisors (see below), whose sum is σ = 13615380240. Its totient is φ = 2931240960.

The previous prime is 6546421499. The next prime is 6546421547. The reversal of 6546421544 is 4451246456.

It can be written as a sum of positive squares in 8 ways, for example, as 3076033444 + 3470388100 = 55462^2 + 58910^2 .

It is not an unprimeable number, because it can be changed into a prime (6546421547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1433024 + ... + 1437584.

Almost surely, 2^6546421544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6546421544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6807690120).

6546421544 is an abundant number, since it is smaller than the sum of its proper divisors (7068958696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6546421544 is a wasteful number, since it uses less digits than its factorization.

6546421544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4990 (or 4986 counting only the distinct ones).

The product of its digits is 460800, while the sum is 41.

The square root of 6546421544 is about 80909.9594858383. The cubic root of 6546421544 is about 1870.6878367959.

The spelling of 6546421544 in words is "six billion, five hundred forty-six million, four hundred twenty-one thousand, five hundred forty-four".