646533542 has 8 divisors (see below), whose sum is σ = 1011965616. Its totient is φ = 309211672.

The previous prime is 646533533. The next prime is 646533557. The reversal of 646533542 is 245335646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 646533496 and 646533505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7027493 + ... + 7027584.

It is an arithmetic number, because the mean of its divisors is an integer number (126495702).

Almost surely, 2^646533542 is an apocalyptic number.

646533542 is a deficient number, since it is larger than the sum of its proper divisors (365432074).

646533542 is a wasteful number, since it uses less digits than its factorization.

646533542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14055102.

The product of its digits is 259200, while the sum is 38.

The square root of 646533542 is about 25427.0238525864. The cubic root of 646533542 is about 864.6964718511.

The spelling of 646533542 in words is "six hundred forty-six million, five hundred thirty-three thousand, five hundred forty-two".