1781373421612 has 12 divisors (see below), whose sum is σ = 3121314915600. Its totient is φ = 889569160016.

The previous prime is 1781373421573. The next prime is 1781373421621. The reversal of 1781373421612 is 2161243731871.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279384112 + ... + 279390487.

It is an arithmetic number, because the mean of its divisors is an integer number (260109576300).

Almost surely, 2^{1781373421612} is an apocalyptic number.

It is an amenable number.

1781373421612 is a deficient number, since it is larger than the sum of its proper divisors (1339941493988).

1781373421612 is a wasteful number, since it uses less digits than its factorization.

1781373421612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558775400 (or 558775398 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The spelling of 1781373421612 in words is "one trillion, seven hundred eighty-one billion, three hundred seventy-three million, four hundred twenty-one thousand, six hundred twelve".