646255063430 has 16 divisors (see below), whose sum is σ = 1200783602304. Its totient is φ = 250163250240.

The previous prime is 646255063369. The next prime is 646255063547. The reversal of 646255063430 is 34360552646.

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, 1042346567 + ... + 1042347186.

It is an arithmetic number, because the mean of its divisors is an integer number (75048975144).

Almost surely, 2^646255063430 is an apocalyptic number.

646255063430 is a deficient number, since it is larger than the sum of its proper divisors (554528538874).

646255063430 is a wasteful number, since it uses less digits than its factorization.

646255063430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2084693791.

The product of its (nonzero) digits is 1555200, while the sum is 44.

The spelling of 646255063430 in words is "six hundred forty-six billion, two hundred fifty-five million, sixty-three thousand, four hundred thirty".