1540025105317 has 2 divisors, whose sum is σ = 1540025105318. Its totient is φ = 1540025105316.

The previous prime is 1540025105299. The next prime is 1540025105369. The reversal of 1540025105317 is 7135015200451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 807205214916 + 732819890401 = 898446^2 + 856049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540025105317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540025106317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770012552658 + 770012552659.

It is an arithmetic number, because the mean of its divisors is an integer number (770012552659).

Almost surely, 2^{1540025105317} is an apocalyptic number.

It is an amenable number.

1540025105317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540025105317 is an equidigital number, since it uses as much as digits as its factorization.

1540025105317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 34.

The spelling of 1540025105317 in words is "one trillion, five hundred forty billion, twenty-five million, one hundred five thousand, three hundred seventeen".