646705005430 has 16 divisors (see below), whose sum is σ = 1269893465424. Its totient is φ = 235165456480.

The previous prime is 646705005409. The next prime is 646705005493. The reversal of 646705005430 is 34500507646.

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, 2939568097 + ... + 2939568316.

It is an arithmetic number, because the mean of its divisors is an integer number (79368341589).

Almost surely, 2^646705005430 is an apocalyptic number.

646705005430 is a deficient number, since it is larger than the sum of its proper divisors (623188459994).

646705005430 is a wasteful number, since it uses less digits than its factorization.

646705005430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5879136431.

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 646705005430 in words is "six hundred forty-six billion, seven hundred five million, five thousand, four hundred thirty".