1781988751151 has 16 divisors (see below), whose sum is σ = 2078272885248. Its totient is φ = 1496224548000.

The previous prime is 1781988751117. The next prime is 1781988751171. The reversal of 1781988751151 is 1511578891871.

It is not a de Polignac number, because 1781988751151 - 2¹⁸ = 1781988489007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1781988751171) 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, 3571925 + ... + 4040126.

It is an arithmetic number, because the mean of its divisors is an integer number (129892055328).

Almost surely, 2^{1781988751151} is an apocalyptic number.

1781988751151 is a deficient number, since it is larger than the sum of its proper divisors (296284134097).

1781988751151 is an equidigital number, since it uses as much as digits as its factorization.

1781988751151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612742.

The product of its digits is 5644800, while the sum is 62.

The spelling of 1781988751151 in words is "one trillion, seven hundred eighty-one billion, nine hundred eighty-eight million, seven hundred fifty-one thousand, one hundred fifty-one".