1550125042139 has 2 divisors, whose sum is σ = 1550125042140. Its totient is φ = 1550125042138.

The previous prime is 1550125042099. The next prime is 1550125042199. The reversal of 1550125042139 is 9312405210551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1550125042139 - 2²⁴ = 1550108264923 is a prime.

It is not a weakly prime, because it can be changed into another prime (1550125042199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775062521069 + 775062521070.

It is an arithmetic number, because the mean of its divisors is an integer number (775062521070).

Almost surely, 2^{1550125042139} is an apocalyptic number.

1550125042139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550125042139 is an equidigital number, since it uses as much as digits as its factorization.

1550125042139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 1550125042139 in words is "one trillion, five hundred fifty billion, one hundred twenty-five million, forty-two thousand, one hundred thirty-nine".