141981785549 has 4 divisors (see below), whose sum is σ = 142009592064. Its totient is φ = 141953979036.

The previous prime is 141981785503. The next prime is 141981785557. The reversal of 141981785549 is 945587189141.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 141981785549 - 2²⁴ = 141965008333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 141981785491 and 141981785500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141981725549) 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, 13895597 + ... + 13905810.

It is an arithmetic number, because the mean of its divisors is an integer number (35502398016).

Almost surely, 2^141981785549 is an apocalyptic number.

It is an amenable number.

141981785549 is a deficient number, since it is larger than the sum of its proper divisors (27806515).

141981785549 is an equidigital number, since it uses as much as digits as its factorization.

141981785549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27806514.

The product of its digits is 14515200, while the sum is 62.

The spelling of 141981785549 in words is "one hundred forty-one billion, nine hundred eighty-one million, seven hundred eighty-five thousand, five hundred forty-nine".