1643146338252 has 54 divisors (see below), whose sum is σ = 4072991593972. Its totient is φ = 515473207936.

The previous prime is 1643146338209. The next prime is 1643146338299. The reversal of 1643146338252 is 2528336413461.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 75477073 + ... + 75498839.

Almost surely, 2^{1643146338252} is an apocalyptic number.

1643146338252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1643146338252 is an abundant number, since it is smaller than the sum of its proper divisors (2429845255720).

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

1643146338252 is an frugal number, since it uses more digits than its factorization.

1643146338252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43575 (or 21789 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 48.

Multiplying 1643146338252 by its sum of digits (48), we get a square (78871024236096 = 8880936²).

The spelling of 1643146338252 in words is "one trillion, six hundred forty-three billion, one hundred forty-six million, three hundred thirty-eight thousand, two hundred fifty-two".