141786806521 has 2 divisors, whose sum is σ = 141786806522. Its totient is φ = 141786806520.

The previous prime is 141786806509. The next prime is 141786806573. The reversal of 141786806521 is 125608687141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104968872121 + 36817934400 = 323989^2 + 191880^2 .

It is a cyclic number.

It is not a de Polignac number, because 141786806521 - 2¹⁵ = 141786773753 is a prime.

It is not a weakly prime, because it can be changed into another prime (141786806321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70893403260 + 70893403261.

It is an arithmetic number, because the mean of its divisors is an integer number (70893403261).

Almost surely, 2^141786806521 is an apocalyptic number.

It is an amenable number.

141786806521 is a deficient number, since it is larger than the sum of its proper divisors (1).

141786806521 is an equidigital number, since it uses as much as digits as its factorization.

141786806521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 141786806521 in words is "one hundred forty-one billion, seven hundred eighty-six million, eight hundred six thousand, five hundred twenty-one".