1773543045640 has 32 divisors (see below), whose sum is σ = 4015888885080. Its totient is φ = 704898634752.

The previous prime is 1773543045563. The next prime is 1773543045643. The reversal of 1773543045640 is 465403453771.

It can be written as a sum of positive squares in 4 ways, for example, as 943800592036 + 829742453604 = 971494^2 + 910902^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1773543045643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141199377 + ... + 141211936.

Almost surely, 2^{1773543045640} is an apocalyptic number.

1773543045640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1773543045640 is an abundant number, since it is smaller than the sum of its proper divisors (2242345839440).

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

1773543045640 is a wasteful number, since it uses less digits than its factorization.

1773543045640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282411481 (or 282411477 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 49.

The spelling of 1773543045640 in words is "one trillion, seven hundred seventy-three billion, five hundred forty-three million, forty-five thousand, six hundred forty".