6493969820 has 24 divisors (see below), whose sum is σ = 14686363104. Its totient is φ = 2397773376.

The previous prime is 6493969793. The next prime is 6493969877. The reversal of 6493969820 is 289693946.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12488144 + ... + 12488663.

It is an arithmetic number, because the mean of its divisors is an integer number (611931796).

Almost surely, 2^6493969820 is an apocalyptic number.

It is an amenable number.

6493969820 is an abundant number, since it is smaller than the sum of its proper divisors (8192393284).

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

6493969820 is a wasteful number, since it uses less digits than its factorization.

6493969820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24976829 (or 24976827 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 56.

The square root of 6493969820 is about 80585.1712165458. The cubic root of 6493969820 is about 1865.6782789727.

The spelling of 6493969820 in words is "six billion, four hundred ninety-three million, nine hundred sixty-nine thousand, eight hundred twenty".