646425444622 has 16 divisors (see below), whose sum is σ = 1013730986880. Its totient is φ = 308568855672.

The previous prime is 646425444589. The next prime is 646425444641. The reversal of 646425444622 is 226444524646.

It is a super-3 number, since 3×646425444622³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13410672 + ... + 13458787.

It is an arithmetic number, because the mean of its divisors is an integer number (63358186680).

Almost surely, 2^646425444622 is an apocalyptic number.

646425444622 is a deficient number, since it is larger than the sum of its proper divisors (367305542258).

646425444622 is a wasteful number, since it uses less digits than its factorization.

646425444622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26870007.

The product of its digits is 8847360, while the sum is 49.

The spelling of 646425444622 in words is "six hundred forty-six billion, four hundred twenty-five million, four hundred forty-four thousand, six hundred twenty-two".