602020660644 has 36 divisors (see below), whose sum is σ = 1638834021916. Its totient is φ = 185237126208.

The previous prime is 602020660621. The next prime is 602020660667. The reversal of 602020660644 is 446066020206.

602020660644 is a `hidden beast` number, since 6 + 0 + 2 + 0 + 2 + 0 + 6 + 6 + 0 + 644 = 666.

It is an interprime number because it is at equal distance from previous prime (602020660621) and next prime (602020660667).

It can be written as a sum of positive squares in 2 ways, for example, as 239279462244 + 362741198400 = 489162^2 + 602280^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 602020660599 and 602020660608.

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 11 ways as a sum of consecutive naturals, for example, 643183999 + ... + 643184934.

Almost surely, 2^602020660644 is an apocalyptic number.

It is an amenable number.

602020660644 is an abundant number, since it is smaller than the sum of its proper divisors (1036813361272).

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

602020660644 is a wasteful number, since it uses less digits than its factorization.

602020660644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286368956 (or 1286368951 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 602020660644 in words is "six hundred two billion, twenty million, six hundred sixty thousand, six hundred forty-four".