6447477900 has 72 divisors (see below), whose sum is σ = 18663430464. Its totient is φ = 1718523200.

The previous prime is 6447477893. The next prime is 6447477937. The reversal of 6447477900 is 97747446.

It is a self number, because there is not a number n which added to its sum of digits gives 6447477900.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 921415 + ... + 928385.

It is an arithmetic number, because the mean of its divisors is an integer number (259214312).

Almost surely, 2^6447477900 is an apocalyptic number.

6447477900 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6447477900 is an abundant number, since it is smaller than the sum of its proper divisors (12215952564).

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

6447477900 is a wasteful number, since it uses less digits than its factorization.

6447477900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10071 (or 10064 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 48.

The square root of 6447477900 is about 80296.1885770427. The cubic root of 6447477900 is about 1861.2153289791.

The spelling of 6447477900 in words is "six billion, four hundred forty-seven million, four hundred seventy-seven thousand, nine hundred".