6403406542 has 16 divisors (see below), whose sum is σ = 10348541280. Its totient is φ = 2954110752.

The previous prime is 6403406519. The next prime is 6403406561. The reversal of 6403406542 is 2456043046.

It is a junction number, because it is equal to n+sod(n) for n = 6403406498 and 6403406507.

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, 6703 + ... + 113365.

It is an arithmetic number, because the mean of its divisors is an integer number (646783830).

Almost surely, 2^6403406542 is an apocalyptic number.

6403406542 is a deficient number, since it is larger than the sum of its proper divisors (3945134738).

6403406542 is a wasteful number, since it uses less digits than its factorization.

6403406542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108987.

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 6403406542 is about 80021.2880551169. The cubic root of 6403406542 is about 1856.9648868357.

Adding to 6403406542 its reverse (2456043046), we get a palindrome (8859449588).

The spelling of 6403406542 in words is "six billion, four hundred three million, four hundred six thousand, five hundred forty-two".