1540651916171 has 2 divisors, whose sum is σ = 1540651916172. Its totient is φ = 1540651916170.

The previous prime is 1540651916093. The next prime is 1540651916197. The reversal of 1540651916171 is 1716191560451.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1540651916171 is a prime.

It is a super-2 number, since 2×1540651916171² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1540651916071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770325958085 + 770325958086.

It is an arithmetic number, because the mean of its divisors is an integer number (770325958086).

Almost surely, 2^{1540651916171} is an apocalyptic number.

1540651916171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540651916171 is an equidigital number, since it uses as much as digits as its factorization.

1540651916171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 47.

The spelling of 1540651916171 in words is "one trillion, five hundred forty billion, six hundred fifty-one million, nine hundred sixteen thousand, one hundred seventy-one".