646214021360 has 40 divisors (see below), whose sum is σ = 1509997624800. Its totient is φ = 257186679552.

The previous prime is 646214021351. The next prime is 646214021399. The reversal of 646214021360 is 63120412646.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×646214021360² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646214021360.

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, 20279747 + ... + 20311586.

It is an arithmetic number, because the mean of its divisors is an integer number (37749940620).

Almost surely, 2^646214021360 is an apocalyptic number.

It is an amenable number.

646214021360 is an abundant number, since it is smaller than the sum of its proper divisors (863783603440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646214021360 is a wasteful number, since it uses less digits than its factorization.

646214021360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40591545 (or 40591539 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 646214021360 in words is "six hundred forty-six billion, two hundred fourteen million, twenty-one thousand, three hundred sixty".