6405471408 has 160 divisors (see below), whose sum is σ = 19550891520. Its totient is φ = 1769287680.

The previous prime is 6405471377. The next prime is 6405471419. The reversal of 6405471408 is 8041745046.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1206616 + ... + 1211912.

It is an arithmetic number, because the mean of its divisors is an integer number (122193072).

Almost surely, 2^6405471408 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 6405471408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9775445760).

6405471408 is an abundant number, since it is smaller than the sum of its proper divisors (13145420112).

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

6405471408 is a wasteful number, since it uses less digits than its factorization.

6405471408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5435 (or 5429 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 6405471408 is about 80034.1889944541. The cubic root of 6405471408 is about 1857.1644666249.

The spelling of 6405471408 in words is "six billion, four hundred five million, four hundred seventy-one thousand, four hundred eight".