1643842749060 has 48 divisors (see below), whose sum is σ = 5114177443200. Its totient is φ = 438358066272.

The previous prime is 1643842749047. The next prime is 1643842749061. The reversal of 1643842749060 is 609472483461.

1643842749060 is a `hidden beast` number, since 1 + 64 + 38 + 4 + 2 + 7 + 490 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1643842748988 and 1643842749006.

It is not an unprimeable number, because it can be changed into a prime (1643842749061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1522076080 + ... + 1522077159.

It is an arithmetic number, because the mean of its divisors is an integer number (106545363400).

Almost surely, 2^{1643842749060} is an apocalyptic number.

1643842749060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1643842749060 is an abundant number, since it is smaller than the sum of its proper divisors (3470334694140).

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

1643842749060 is a wasteful number, since it uses less digits than its factorization.

1643842749060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044153257 (or 3044153249 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 54.

The spelling of 1643842749060 in words is "one trillion, six hundred forty-three billion, eight hundred forty-two million, seven hundred forty-nine thousand, sixty".