1781291082352 has 20 divisors (see below), whose sum is σ = 3451309276176. Its totient is φ = 890630624000.

The previous prime is 1781291082317. The next prime is 1781291082353. The reversal of 1781291082352 is 2532801921871.

It is a junction number, because it is equal to n+sod(n) for n = 1781291082296 and 1781291082305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1781291082353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86568 + ... + 1889464.

Almost surely, 2^{1781291082352} is an apocalyptic number.

It is an amenable number.

1781291082352 is a deficient number, since it is larger than the sum of its proper divisors (1670018193824).

1781291082352 is a wasteful number, since it uses less digits than its factorization.

1781291082352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864656 (or 1864650 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 49.

The spelling of 1781291082352 in words is "one trillion, seven hundred eighty-one billion, two hundred ninety-one million, eighty-two thousand, three hundred fifty-two".