142001268649 has 2 divisors, whose sum is σ = 142001268650.
Its totient is φ = 142001268648.
The previous prime is 142001268593. The next prime is 142001268653. The reversal of 142001268649 is 946862100241.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 134245296025 + 7755972624 = 366395^2 + 88068^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-142001268649 is a prime.
It is not a weakly prime, because it can be changed into another prime (142001262649) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71000634324 + 71000634325.
It is an arithmetic number, because the mean of its divisors is an integer number (71000634325).
Almost surely, 2142001268649 is an apocalyptic number.
It is an amenable number.
142001268649 is a deficient number, since it is larger than the sum of its proper divisors (1).
142001268649 is an equidigital number, since it uses as much as digits as its factorization.
142001268649 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 165888, while the sum is 43.
The spelling of 142001268649 in words is "one hundred forty-two billion, one million, two hundred sixty-eight thousand, six hundred forty-nine".