6400406104 has 8 divisors (see below), whose sum is σ = 12000761460. Its totient is φ = 3200203048.

The previous prime is 6400406071. The next prime is 6400406107. The reversal of 6400406104 is 4016040046.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×6400406104² = 81930396592240917632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6400406107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400025374 + ... + 400025389.

Almost surely, 2^6400406104 is an apocalyptic number.

It is an amenable number.

6400406104 is a deficient number, since it is larger than the sum of its proper divisors (5600355356).

6400406104 is a wasteful number, since it uses less digits than its factorization.

6400406104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800050769 (or 800050765 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 6400406104 is about 80002.5381097375. The cubic root of 6400406104 is about 1856.6748027769.

The spelling of 6400406104 in words is "six billion, four hundred million, four hundred six thousand, one hundred four".