6421494541 has 48 divisors (see below), whose sum is σ = 8659768320. Its totient is φ = 4692280320.

The previous prime is 6421494533. The next prime is 6421494553. The reversal of 6421494541 is 1454941246.

It is not a de Polignac number, because 6421494541 - 2³ = 6421494533 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6421494494 and 6421494503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421494511) 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 47 ways as a sum of consecutive naturals, for example, 2866900 + ... + 2869138.

It is an arithmetic number, because the mean of its divisors is an integer number (180411840).

Almost surely, 2^6421494541 is an apocalyptic number.

It is an amenable number.

6421494541 is a deficient number, since it is larger than the sum of its proper divisors (2238273779).

6421494541 is a wasteful number, since it uses less digits than its factorization.

6421494541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 2587 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 6421494541 is about 80134.2282735661. The cubic root of 6421494541 is about 1858.7117279763.

The spelling of 6421494541 in words is "six billion, four hundred twenty-one million, four hundred ninety-four thousand, five hundred forty-one".