1540204151191 has 2 divisors, whose sum is σ = 1540204151192. Its totient is φ = 1540204151190.

The previous prime is 1540204151173. The next prime is 1540204151197. The reversal of 1540204151191 is 1911514020451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1540204151191 - 2²⁵ = 1540170596759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1540204151197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 770102075595 + 770102075596.

It is an arithmetic number, because the mean of its divisors is an integer number (770102075596).

Almost surely, 2^{1540204151191} is an apocalyptic number.

1540204151191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1540204151191 is an equidigital number, since it uses as much as digits as its factorization.

1540204151191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 34.

The spelling of 1540204151191 in words is "one trillion, five hundred forty billion, two hundred four million, one hundred fifty-one thousand, one hundred ninety-one".