1781044557348 has 24 divisors (see below), whose sum is σ = 4749452153152. Its totient is φ = 508869873504.

The previous prime is 1781044557307. The next prime is 1781044557349. The reversal of 1781044557348 is 8437554401871.

It is not an unprimeable number, because it can be changed into a prime (1781044557349) 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, 10601455615 + ... + 10601455782.

Almost surely, 2^{1781044557348} is an apocalyptic number.

It is an amenable number.

1781044557348 is an abundant number, since it is smaller than the sum of its proper divisors (2968407595804).

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

1781044557348 is a wasteful number, since it uses less digits than its factorization.

1781044557348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21202911411 (or 21202911409 counting only the distinct ones).

The product of its (nonzero) digits is 15052800, while the sum is 57.

The spelling of 1781044557348 in words is "one trillion, seven hundred eighty-one billion, forty-four million, five hundred fifty-seven thousand, three hundred forty-eight".