6406431106 has 4 divisors (see below), whose sum is σ = 9609646662. Its totient is φ = 3203215552.

The previous prime is 6406431041. The next prime is 6406431131. The reversal of 6406431106 is 6011346046.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6404000625 + 2430481 = 80025^2 + 1559^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1601607775 + ... + 1601607778.

Almost surely, 2^6406431106 is an apocalyptic number.

6406431106 is a deficient number, since it is larger than the sum of its proper divisors (3203215556).

6406431106 is a wasteful number, since it uses less digits than its factorization.

6406431106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3203215555.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 6406431106 is about 80040.1843201276. The cubic root of 6406431106 is about 1857.2572117124.

The spelling of 6406431106 in words is "six billion, four hundred six million, four hundred thirty-one thousand, one hundred six".