141981785057 has 4 divisors (see below), whose sum is σ = 162264897216. Its totient is φ = 121698672900.

The previous prime is 141981784969. The next prime is 141981785059. The reversal of 141981785057 is 750587189141.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 750587189141 = 3881 ⋅193400461.

It is a de Polignac number, because none of the positive numbers 2^k-141981785057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 141981784993 and 141981785011.

It is not an unprimeable number, because it can be changed into a prime (141981785059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10141556069 + ... + 10141556082.

It is an arithmetic number, because the mean of its divisors is an integer number (40566224304).

Almost surely, 2^141981785057 is an apocalyptic number.

It is an amenable number.

141981785057 is a deficient number, since it is larger than the sum of its proper divisors (20283112159).

141981785057 is an equidigital number, since it uses as much as digits as its factorization.

141981785057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20283112158.

The product of its (nonzero) digits is 2822400, while the sum is 56.

The spelling of 141981785057 in words is "one hundred forty-one billion, nine hundred eighty-one million, seven hundred eighty-five thousand, fifty-seven".