646004450542 has 16 divisors (see below), whose sum is σ = 1059119430912. Its totient is φ = 293076931320.

The previous prime is 646004450527. The next prime is 646004450563. The reversal of 646004450542 is 245054400646.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 646004450495 and 646004450504.

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, 28060998 + ... + 28084009.

It is an arithmetic number, because the mean of its divisors is an integer number (66194964432).

Almost surely, 2^646004450542 is an apocalyptic number.

646004450542 is a deficient number, since it is larger than the sum of its proper divisors (413114980370).

646004450542 is a wasteful number, since it uses less digits than its factorization.

646004450542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56145543.

The product of its (nonzero) digits is 460800, while the sum is 40.

The spelling of 646004450542 in words is "six hundred forty-six billion, four million, four hundred fifty thousand, five hundred forty-two".