643051452052 has 6 divisors (see below), whose sum is σ = 1125340041098. Its totient is φ = 321525726024.

The previous prime is 643051452049. The next prime is 643051452067. The reversal of 643051452052 is 250254150346.

It can be written as a sum of positive squares in only one way, i.e., 632082241296 + 10969210756 = 795036^2 + 104734^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80381431503 + ... + 80381431510.

Almost surely, 2^643051452052 is an apocalyptic number.

It is an amenable number.

643051452052 is a deficient number, since it is larger than the sum of its proper divisors (482288589046).

643051452052 is a wasteful number, since it uses less digits than its factorization.

643051452052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160762863017 (or 160762863015 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 643051452052 in words is "six hundred forty-three billion, fifty-one million, four hundred fifty-two thousand, fifty-two".